diff --git a/onert-micro/onert-micro/include/pal/cmsisnn/KernelsToBuild.lst b/onert-micro/onert-micro/include/pal/cmsisnn/KernelsToBuild.lst
index 56c7822d564..f3fba6542af 100644
--- a/onert-micro/onert-micro/include/pal/cmsisnn/KernelsToBuild.lst
+++ b/onert-micro/onert-micro/include/pal/cmsisnn/KernelsToBuild.lst
@@ -85,3 +85,5 @@ REGISTER_KERNEL(SOFTMAX, Softmax)
 #/*REGISTER_KERNEL(ZEROS_LIKE, ZerosLike)*/
 #/*REGISTER_KERNEL(SQUEEZE, Squeeze)*/
 #/*REGISTER_KERNEL(UNPACK, Unpack)*/
+REGISTER_KERNEL(RELU, Relu)
+REGISTER_KERNEL(RELU6, Relu6)
diff --git a/onert-micro/onert-micro/include/pal/cmsisnn/PALRelu.h b/onert-micro/onert-micro/include/pal/cmsisnn/PALRelu.h
new file mode 100644
index 00000000000..b20a5d8586a
--- /dev/null
+++ b/onert-micro/onert-micro/include/pal/cmsisnn/PALRelu.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ * Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ONERT_MICRO_EXECUTE_PAL_RELU_H
+#define ONERT_MICRO_EXECUTE_PAL_RELU_H
+
+#include "PALReluCommon.h"
+
+#include <arm_nnfunctions.h>
+
+namespace onert_micro
+{
+namespace execute
+{
+namespace pal
+{
+
+template <>
+OMStatus ReLUCommon<int8_t>(const int flat_size, const int8_t *input_data, int8_t *output_data,
+                            const float alpha, const bool is_relu_6)
+{
+  // 1. Relu
+  if (is_relu_6 == false && alpha == 0)
+  {
+    memcpy(output_data, input_data, flat_size);
+    arm_relu_q7(output_data, flat_size);
+  }
+  // 2. Relu6
+  else if (is_relu_6 && alpha == 0)
+  {
+    memcpy(output_data, input_data, flat_size);
+    arm_relu6_s8(output_data, flat_size);
+  }
+  // 3. Leaky_Relu not supported by cmsis_nn
+  else if (alpha != 0)
+  {
+    for (int i = 0; i < flat_size; i++)
+    {
+      const int8_t val = input_data[i];
+      int8_t result = val > 0 ? val : val * alpha;
+      output_data[i] = result;
+    }
+  }
+
+  return Ok;
+}
+
+} // namespace pal
+} // namespace execute
+} // namespace onert_micro
+#endif // ONERT_MICRO_EXECUTE_PAL_RELU_H
diff --git a/onert-micro/onert-micro/include/pal/common/PALReluCommon.h b/onert-micro/onert-micro/include/pal/common/PALReluCommon.h
index 6490824d3f9..c454513a5ce 100644
--- a/onert-micro/onert-micro/include/pal/common/PALReluCommon.h
+++ b/onert-micro/onert-micro/include/pal/common/PALReluCommon.h
@@ -29,14 +29,15 @@ namespace execute
 namespace pal
 {
 
-inline OMStatus ReLUCommon(const int flat_size, const float *input_data, float *output_data,
-                           const float alpha, const bool is_relu_6)
+template <typename Type>
+OMStatus ReLUCommon(const int flat_size, const Type *input_data, Type *output_data,
+                    const float alpha, const bool is_relu_6)
 {
-  const float relu_6_value = 6.0f;
+  const Type relu_6_value = 6.0f;
   for (int i = 0; i < flat_size; i++)
   {
-    const float val = input_data[i];
-    float result = val > 0 ? val : val * alpha;
+    const Type val = input_data[i];
+    Type result = val > 0 ? val : val * alpha;
     result = is_relu_6 ? (result > relu_6_value ? relu_6_value : result) : result;
     output_data[i] = result;
   }
diff --git a/onert-micro/onert-micro/include/pal/mcu/PALRelu.h b/onert-micro/onert-micro/include/pal/mcu/PALRelu.h
new file mode 100644
index 00000000000..8a405aedce5
--- /dev/null
+++ b/onert-micro/onert-micro/include/pal/mcu/PALRelu.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ * Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ONERT_MICRO_EXECUTE_PAL_RELU_H
+#define ONERT_MICRO_EXECUTE_PAL_RELU_H
+
+#include "PALReluCommon.h"
+#include "PALUtils.h"
+
+#endif // ONERT_MICRO_EXECUTE_PAL_RELU_H
diff --git a/onert-micro/onert-micro/include/test_models/relu/Int8ReLUKernel.h b/onert-micro/onert-micro/include/test_models/relu/Int8ReLUKernel.h
new file mode 100644
index 00000000000..0f671ea9911
--- /dev/null
+++ b/onert-micro/onert-micro/include/test_models/relu/Int8ReLUKernel.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ONERT_MICRO_TEST_MODELS_INT8_RELU_KERNEL_H
+#define ONERT_MICRO_TEST_MODELS_INT8_RELU_KERNEL_H
+
+#include "TestDataReLUBase.h"
+
+namespace onert_micro
+{
+namespace test_model
+{
+namespace relu_s8
+{
+/*
+ * ReLU Kernel:
+ *
+ *      Input(1, 3, 3, 2)
+ *            |
+ *          ReLU
+ *            |
+ *      Output(1, 3, 3, 2)
+ */
+const unsigned char test_kernel_model_circle[] = {
+  0x1c, 0x00, 0x00, 0x00, 0x43, 0x49, 0x52, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x10, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00, 0xa8, 0x01, 0x00, 0x00, 0xc4, 0x01, 0x00, 0x00,
+  0x03, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0xf8, 0xff, 0xff, 0xff, 0xfc, 0xff, 0xff, 0xff, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00,
+  0x10, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x1c, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00,
+  0x0a, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x84, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x92, 0xff, 0xff, 0xff, 0x14, 0x00, 0x00, 0x00,
+  0x48, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x44, 0x00, 0x00, 0x00,
+  0x84, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x42,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, 0x03, 0x00, 0x00, 0x00, 0x6f, 0x66, 0x6d, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00, 0x13, 0x00, 0x0c, 0x00,
+  0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x54, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x14, 0x00,
+  0x04, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x10, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
+  0x24, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x42, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0xc3, 0x03, 0x00, 0x00, 0x00, 0x69, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15,
+  0x11, 0x00, 0x00, 0x00, 0x4f, 0x4e, 0x45, 0x2d, 0x74, 0x66, 0x6c, 0x69, 0x74, 0x65, 0x32, 0x63,
+  0x69, 0x72, 0x63, 0x6c, 0x65, 0x00, 0x00, 0x00};
+const std::vector<int8_t> input_data = {4, 11, -10, 9, -4, -20, 18, 7, -9,
+                                        6, -4, 10,  8, 3,  -21, -7, 1, 7};
+const std::vector<int8_t> reference_output_data = {4, 6, 0, 6, 0, 0, 6, 6, 0,
+                                                   6, 0, 6, 6, 3, 0, 0, 1, 6};
+
+} // namespace relu_s8
+
+class TestDataS8ReLU : public TestDataReLUBase<int8_t>
+{
+public:
+  TestDataS8ReLU()
+  {
+    _input_data = relu_s8::input_data;
+    _reference_output_data = relu_s8::reference_output_data;
+    _test_kernel_model_circle = relu_s8::test_kernel_model_circle;
+  }
+
+  ~TestDataS8ReLU() override = default;
+};
+
+} // namespace test_model
+} // namespace onert_micro
+
+#endif // ONERT_MICRO_TEST_MODELS_INT8_RELU_KERNEL_H
diff --git a/onert-micro/onert-micro/include/test_models/relu/NegReLUKernel.h b/onert-micro/onert-micro/include/test_models/relu/NegReLUKernel.h
index 26b03538f2d..74bdbbb3b70 100644
--- a/onert-micro/onert-micro/include/test_models/relu/NegReLUKernel.h
+++ b/onert-micro/onert-micro/include/test_models/relu/NegReLUKernel.h
@@ -77,6 +77,59 @@ class NegTestDataInputOutputTypeMismatchReLUKernel : public NegTestDataBase
   const unsigned char *_test_kernel_model_circle;
 };
 
+namespace neg_input_output_shape_mismatch_kernel
+{
+/*
+ * ReLU Kernel with input output type mismatch:
+ *
+ *      Input(1, 3, 3, 2) - Int8
+ *            |
+ *          ReLU
+ *            |
+ *      Output(1, 3, 3, 1) - Int8
+ */
+const unsigned char test_kernel_model_circle[] = {
+  0x18, 0x00, 0x00, 0x00, 0x43, 0x49, 0x52, 0x30, 0x00, 0x00, 0x0e, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x08, 0x00, 0x10, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x2c, 0x00, 0x00, 0x00, 0x14, 0x01, 0x00, 0x00, 0x30, 0x01, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x18, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xf8, 0xff, 0xff, 0xff,
+  0xfc, 0xff, 0xff, 0xff, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00, 0x10, 0x00, 0x0c, 0x00,
+  0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00,
+  0x48, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x0a, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0a, 0x00, 0x00, 0x00,
+  0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0xd4, 0xff, 0xff, 0xff, 0x0c, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x6f, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x10, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x69, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00,
+  0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x11, 0x00, 0x00, 0x00, 0x4f, 0x4e, 0x45, 0x2d,
+  0x74, 0x66, 0x6c, 0x69, 0x74, 0x65, 0x32, 0x63, 0x69, 0x72, 0x63, 0x6c, 0x65, 0x00, 0x00, 0x00};
+} // namespace neg_input_output_shape_mismatch_kernel
+
+class NegTestDataInputOutputShapeMismatchReLUKernel : public NegTestDataBase
+{
+public:
+  NegTestDataInputOutputShapeMismatchReLUKernel()
+  {
+    _test_kernel_model_circle = neg_input_output_shape_mismatch_kernel::test_kernel_model_circle;
+  }
+
+  ~NegTestDataInputOutputShapeMismatchReLUKernel() override = default;
+
+  const unsigned char *get_model_ptr() override final { return _test_kernel_model_circle; }
+
+protected:
+  const unsigned char *_test_kernel_model_circle;
+};
+
 } // namespace test_model
 } // namespace onert_micro
 
diff --git a/onert-micro/onert-micro/include/test_models/relu6/Int8ReLU6Kernel.h b/onert-micro/onert-micro/include/test_models/relu6/Int8ReLU6Kernel.h
new file mode 100644
index 00000000000..b998bae030c
--- /dev/null
+++ b/onert-micro/onert-micro/include/test_models/relu6/Int8ReLU6Kernel.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ONERT_MICRO_TEST_MODELS_INT8_RELU6_KERNEL_H
+#define ONERT_MICRO_TEST_MODELS_INT8_RELU6_KERNEL_H
+
+#include "TestDataReLU6Base.h"
+
+namespace onert_micro
+{
+namespace test_model
+{
+namespace relu6_s8
+{
+/*
+ * ReLU6 Kernel:
+ *
+ *      Input(1, 3, 3, 2)
+ *            |
+ *          ReLU6
+ *            |
+ *      Output(1, 3, 3, 2)
+ */
+const unsigned char test_kernel_model_circle[] = {
+  0x1c, 0x00, 0x00, 0x00, 0x43, 0x49, 0x52, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x10, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00, 0xa8, 0x01, 0x00, 0x00, 0xc4, 0x01, 0x00, 0x00,
+  0x03, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0xf8, 0xff, 0xff, 0xff, 0xfc, 0xff, 0xff, 0xff, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00,
+  0x10, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x1c, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00,
+  0x0a, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x84, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x92, 0xff, 0xff, 0xff, 0x14, 0x00, 0x00, 0x00,
+  0x48, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x44, 0x00, 0x00, 0x00,
+  0x84, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x42,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, 0x03, 0x00, 0x00, 0x00, 0x6f, 0x66, 0x6d, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00, 0x13, 0x00, 0x0c, 0x00,
+  0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x54, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x14, 0x00,
+  0x04, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x10, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
+  0x24, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x42, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0xc3, 0x03, 0x00, 0x00, 0x00, 0x69, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15,
+  0x11, 0x00, 0x00, 0x00, 0x4f, 0x4e, 0x45, 0x2d, 0x74, 0x66, 0x6c, 0x69, 0x74, 0x65, 0x32, 0x63,
+  0x69, 0x72, 0x63, 0x6c, 0x65, 0x00, 0x00, 0x00};
+const std::vector<int8_t> input_data = {4, 11, -10, 9, -4, -20, 18, 7, -9,
+                                        6, -4, 10,  8, 3,  -21, -7, 1, 7};
+const std::vector<int8_t> reference_output_data = {4, 6, 0, 6, 0, 0, 6, 6, 0,
+                                                   6, 0, 6, 6, 3, 0, 0, 1, 6};
+
+} // namespace relu6_s8
+
+class TestDataS8ReLU6 : public TestDataReLU6Base<int8_t>
+{
+public:
+  TestDataS8ReLU6()
+  {
+    _input_data = relu6_s8::input_data;
+    _reference_output_data = relu6_s8::reference_output_data;
+    _test_kernel_model_circle = relu6_s8::test_kernel_model_circle;
+  }
+
+  ~TestDataS8ReLU6() override = default;
+};
+
+} // namespace test_model
+} // namespace onert_micro
+
+#endif // ONERT_MICRO_TEST_MODELS_INT8_RELU6_KERNEL_H
diff --git a/onert-micro/onert-micro/include/test_models/relu6/NegReLU6Kernel.h b/onert-micro/onert-micro/include/test_models/relu6/NegReLU6Kernel.h
index d048e247cb5..595a3fabb37 100644
--- a/onert-micro/onert-micro/include/test_models/relu6/NegReLU6Kernel.h
+++ b/onert-micro/onert-micro/include/test_models/relu6/NegReLU6Kernel.h
@@ -77,6 +77,62 @@ class NegTestDataInputOutputTypeMismatchReLU6Kernel : public NegTestDataBase
   const unsigned char *_test_kernel_model_circle;
 };
 
+namespace neg_input_output_shape_mismatch_kernel
+{
+/*
+ * ReLU6 Kernel with input output shape mismatch:
+ *
+ *      Input(1, 3, 3, 2)
+ *            |
+ *          ReLU6
+ *            |
+ *      Output(1, 3, 3, 1)
+ */
+const unsigned char test_kernel_model_circle[] = {
+  0x18, 0x00, 0x00, 0x00, 0x43, 0x49, 0x52, 0x30, 0x00, 0x00, 0x0e, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x08, 0x00, 0x10, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x2c, 0x00, 0x00, 0x00, 0x1c, 0x01, 0x00, 0x00, 0x38, 0x01, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x18, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0xf8, 0xff, 0xff, 0xff,
+  0xfc, 0xff, 0xff, 0xff, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00, 0x10, 0x00, 0x0c, 0x00,
+  0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00,
+  0x48, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x0a, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0a, 0x00, 0x00, 0x00,
+  0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0xd0, 0xff, 0xff, 0xff, 0x10, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x09, 0x0c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x6f, 0x66, 0x6d, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x14, 0x00, 0x10, 0x00, 0x0f, 0x00, 0x08, 0x00, 0x04, 0x00,
+  0x0c, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09,
+  0x0c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x69, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15,
+  0x11, 0x00, 0x00, 0x00, 0x4f, 0x4e, 0x45, 0x2d, 0x74, 0x66, 0x6c, 0x69, 0x74, 0x65, 0x32, 0x63,
+  0x69, 0x72, 0x63, 0x6c, 0x65, 0x00, 0x00, 0x00
+
+};
+} // namespace neg_input_output_shape_mismatch_kernel
+
+class NegTestDataInputOutputShapeMismatchReLU6Kernel : public NegTestDataBase
+{
+public:
+  NegTestDataInputOutputShapeMismatchReLU6Kernel()
+  {
+    _test_kernel_model_circle = neg_input_output_shape_mismatch_kernel::test_kernel_model_circle;
+  }
+
+  ~NegTestDataInputOutputShapeMismatchReLU6Kernel() override = default;
+
+  const unsigned char *get_model_ptr() override final { return _test_kernel_model_circle; }
+
+protected:
+  const unsigned char *_test_kernel_model_circle;
+};
+
 } // namespace test_model
 } // namespace onert_micro
 
diff --git a/onert-micro/onert-micro/src/execute/kernels/ReluCommon.cpp b/onert-micro/onert-micro/src/execute/kernels/ReluCommon.cpp
index ae464bffef9..3393c72e5c9 100644
--- a/onert-micro/onert-micro/src/execute/kernels/ReluCommon.cpp
+++ b/onert-micro/onert-micro/src/execute/kernels/ReluCommon.cpp
@@ -15,7 +15,7 @@
  */
 
 #include "execute/kernels/ReluCommon.h"
-#include "PALReluCommon.h"
+#include "PALRelu.h"
 
 using namespace onert_micro;
 using namespace onert_micro::execute;
@@ -86,6 +86,23 @@ OMStatus onert_micro::execute::execute_relu_common(const OMExecuteArgs &execute_
     }
     break;
 #endif // DIS_FLOAT
+#ifndef DIS_QUANT
+    case circle::TensorType_INT8:
+    {
+      core::OMRuntimeShape input_shape(input);
+      core::OMRuntimeShape output_shape(output);
+
+      const auto *input_data_int8 = core::utils::castInputData<int8_t>(input_data);
+      auto *output_data_int8 = core::utils::castOutputData<int8_t>(output_data);
+
+      assert(output_data_int8);
+      const int flat_size = input_shape.flatSize();
+
+      status = pal::ReLUCommon(flat_size, input_data_int8, output_data_int8, alpha, is_relu_6);
+    }
+    break;
+#endif // DIS_QUANT
+
     default:
     {
       status = UnsupportedType;
diff --git a/onert-micro/onert-micro/src/execute/kernels/tests/Relu.test.cpp b/onert-micro/onert-micro/src/execute/kernels/tests/Relu.test.cpp
index 280e512a2ac..0390f01af44 100644
--- a/onert-micro/onert-micro/src/execute/kernels/tests/Relu.test.cpp
+++ b/onert-micro/onert-micro/src/execute/kernels/tests/Relu.test.cpp
@@ -16,6 +16,7 @@
 
 #include "execute/OMTestUtils.h"
 #include "test_models/relu/FloatReLUKernel.h"
+#include "test_models/relu/Int8ReLUKernel.h"
 #include "test_models/relu/NegReLUKernel.h"
 
 namespace onert_micro
@@ -41,6 +42,14 @@ TEST_F(ReLUTest, Float_P)
               FloatArrayNear(test_data_kernel.get_output_data_by_index(0), 0.0001f));
 }
 
+TEST_F(ReLUTest, S8_P)
+{
+  onert_micro::test_model::TestDataS8ReLU test_data_kernel;
+  std::vector<int8_t> output_data_vector =
+    onert_micro::execute::testing::checkKernel<int8_t>(1, &test_data_kernel);
+  EXPECT_THAT(output_data_vector, test_data_kernel.get_output_data_by_index(0));
+}
+
 TEST_F(ReLUTest, Input_output_type_mismatch_NEG)
 {
   onert_micro::test_model::NegTestDataInputOutputTypeMismatchReLUKernel test_data_kernel;
@@ -48,6 +57,13 @@ TEST_F(ReLUTest, Input_output_type_mismatch_NEG)
   EXPECT_DEATH(checkNEGSISOKernel(&test_data_kernel), "");
 }
 
+TEST_F(ReLUTest, Input_output_shape_mismatch_NEG)
+{
+  onert_micro::test_model::NegTestDataInputOutputShapeMismatchReLUKernel test_data_kernel;
+
+  EXPECT_DEATH(checkNEGSISOKernel(&test_data_kernel), "");
+}
+
 } // namespace testing
 } // namespace execute
 } // namespace onert_micro
diff --git a/onert-micro/onert-micro/src/execute/kernels/tests/Relu6.test.cpp b/onert-micro/onert-micro/src/execute/kernels/tests/Relu6.test.cpp
index 0279c0d2728..68d35934a0a 100644
--- a/onert-micro/onert-micro/src/execute/kernels/tests/Relu6.test.cpp
+++ b/onert-micro/onert-micro/src/execute/kernels/tests/Relu6.test.cpp
@@ -17,6 +17,7 @@
 #include "execute/OMTestUtils.h"
 #include "test_models/relu6/FloatReLU6Kernel.h"
 #include "test_models/relu6/NegReLU6Kernel.h"
+#include "test_models/relu6/Int8ReLU6Kernel.h"
 
 namespace onert_micro
 {
@@ -41,6 +42,14 @@ TEST_F(ReLU6Test, Float_P)
               FloatArrayNear(test_data_kernel.get_output_data_by_index(0), 0.0001f));
 }
 
+TEST_F(ReLU6Test, S8_P)
+{
+  onert_micro::test_model::TestDataS8ReLU6 test_data_kernel;
+  std::vector<int8_t> output_data_vector =
+    onert_micro::execute::testing::checkKernel<int8_t>(1, &test_data_kernel);
+  EXPECT_THAT(output_data_vector, test_data_kernel.get_output_data_by_index(0));
+}
+
 TEST_F(ReLU6Test, Input_output_type_mismatch_NEG)
 {
   onert_micro::test_model::NegTestDataInputOutputTypeMismatchReLU6Kernel test_data_kernel;
@@ -48,6 +57,13 @@ TEST_F(ReLU6Test, Input_output_type_mismatch_NEG)
   EXPECT_DEATH(checkNEGSISOKernel(&test_data_kernel), "");
 }
 
+TEST_F(ReLU6Test, Input_output_shape_mismatch_NEG)
+{
+  onert_micro::test_model::NegTestDataInputOutputShapeMismatchReLU6Kernel test_data_kernel;
+
+  EXPECT_DEATH(checkNEGSISOKernel(&test_data_kernel), "");
+}
+
 } // namespace testing
 } // namespace execute
 } // namespace onert_micro