diff --git a/lib/brasil_fields.dart b/lib/brasil_fields.dart
index c83c4fc..9fb42dc 100644
--- a/lib/brasil_fields.dart
+++ b/lib/brasil_fields.dart
@@ -5,6 +5,7 @@ export 'src/formatters/cartao_bancario_input_formatter.dart';
 export 'src/formatters/centavos_input_formatter.dart';
 export 'src/formatters/cep_input_formatter.dart';
 export 'src/formatters/cest_input_formatter.dart';
+export 'src/formatters/cert_nascimento_input_formatter.dart';
 export 'src/formatters/cnpj_input_formatter.dart';
 export 'src/formatters/cns_formatter.dart';
 export 'src/formatters/compound_formatters/cpf_ou_cpnj_formatter.dart';
diff --git a/lib/src/formatters/cert_nascimento_input_formatter.dart b/lib/src/formatters/cert_nascimento_input_formatter.dart
new file mode 100644
index 0000000..31dcf77
--- /dev/null
+++ b/lib/src/formatters/cert_nascimento_input_formatter.dart
@@ -0,0 +1,55 @@
+import 'package:flutter/services.dart';
+
+/// Formata o valor do campo com a mascara de Certidão de Nascimento: `XXXXXX XX XX XXXX X XXXXX XXX XXXXXXX XX`
+class CertNascimentoInputFormatter extends TextInputFormatter {
+  @override
+  TextEditingValue formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) {
+    // verifica o tamanho máximo do campo
+    if (newValue.text.length > 32) return oldValue;
+
+    var posicaoCursor = newValue.selection.end;
+    var substrIndex = 0;
+    final valorFinal = StringBuffer();
+
+    if (newValue.text.length >= 7) {
+      valorFinal.write('${newValue.text.substring(0, substrIndex = 6)} ');
+      if (newValue.selection.end >= 6) posicaoCursor++;
+    }
+    if (newValue.text.length >= 9) {
+      valorFinal.write('${newValue.text.substring(6, substrIndex = 8)} ');
+      if (newValue.selection.end >= 8) posicaoCursor++;
+    }
+    if (newValue.text.length >= 11) {
+      valorFinal.write('${newValue.text.substring(8, substrIndex = 10)} ');
+      if (newValue.selection.end >= 10) posicaoCursor++;
+    }
+    if (newValue.text.length >= 15) {
+      valorFinal.write('${newValue.text.substring(10, substrIndex = 14)} ');
+      if (newValue.selection.end >= 14) posicaoCursor++;
+    }
+    if (newValue.text.length >= 16) {
+      valorFinal.write('${newValue.text.substring(14, substrIndex = 15)} ');
+      if (newValue.selection.end >= 15) posicaoCursor++;
+    }
+    if (newValue.text.length >= 21) {
+      valorFinal.write('${newValue.text.substring(15, substrIndex = 20)} ');
+      if (newValue.selection.end >= 20) posicaoCursor++;
+    }
+    if (newValue.text.length >= 24) {
+      valorFinal.write('${newValue.text.substring(20, substrIndex = 23)} ');
+      if (newValue.selection.end >= 23) posicaoCursor++;
+    }
+    if (newValue.text.length >= 31) {
+      valorFinal.write('${newValue.text.substring(23, substrIndex = 30)} ');
+      if (newValue.selection.end >= 30) posicaoCursor++;
+    }
+    if (newValue.text.length >= substrIndex) {
+      valorFinal.write(newValue.text.substring(substrIndex));
+    }
+
+    return TextEditingValue(
+      text: valorFinal.toString(),
+      selection: TextSelection.collapsed(offset: posicaoCursor),
+    );
+  }
+}
diff --git a/test/brasil_fields_test.dart b/test/brasil_fields_test.dart
index 02d7725..d011500 100644
--- a/test/brasil_fields_test.dart
+++ b/test/brasil_fields_test.dart
@@ -173,6 +173,14 @@ void main() {
     expect(textController.text, '01/01/1900');
   });
 
+  testWidgets('CertNascimentoFormatter', (WidgetTester tester) async {
+    final textController = TextEditingController();
+    await tester.pumpWidget(boilerplate(CertNascimentoInputFormatter(), textController));
+
+    await tester.enterText(find.byType(TextField), '11111122334444566666777888888899');
+    expect(textController.text, '111111 22 33 4444 5 66666 777 8888888 99');
+  });
+    
   testWidgets('HoraInputFormatter', (WidgetTester tester) async {
     final textController = TextEditingController();
     await tester.pumpWidget(boilerplate(HoraInputFormatter(), textController));