diff --git a/src/main/java/me/snaptime/reply/domain/ChildReply.java b/src/main/java/me/snaptime/reply/domain/ChildReply.java
index 79c195d3..684f1971 100644
--- a/src/main/java/me/snaptime/reply/domain/ChildReply.java
+++ b/src/main/java/me/snaptime/reply/domain/ChildReply.java
@@ -33,7 +33,7 @@ public class ChildReply extends BaseTimeEntity {
     @JoinColumn(name = "parent_reply_id",nullable = false)
     private ParentReply parentReply;
 
-    @OneToOne(fetch = FetchType.EAGER)
+    @ManyToOne(fetch = FetchType.EAGER)
     @OnDelete(action = OnDeleteAction.SET_NULL)
     @JoinColumn(name = "reply_tag_user_id", nullable = true)
     private User replyTagUser;
diff --git a/src/main/java/me/snaptime/reply/dto/res/ParentReplyInfoResDto.java b/src/main/java/me/snaptime/reply/dto/res/ParentReplyInfoResDto.java
index fed36ce4..64f6004c 100644
--- a/src/main/java/me/snaptime/reply/dto/res/ParentReplyInfoResDto.java
+++ b/src/main/java/me/snaptime/reply/dto/res/ParentReplyInfoResDto.java
@@ -15,9 +15,10 @@ public record ParentReplyInfoResDto(
         String writerUserName,
         String content,
         Long replyId,
-        String timeAgo
+        String timeAgo,
+        Long childReplyCnt
 ) {
-    public static ParentReplyInfoResDto toDto(Tuple tuple, String profilePhotoURL, String timeAgo){
+    public static ParentReplyInfoResDto toDto(Tuple tuple, String profilePhotoURL, String timeAgo,Long childReplyCnt){
         return ParentReplyInfoResDto.builder()
                 .writerEmail(tuple.get(user.email))
                 .writerProfilePhotoURL(profilePhotoURL)
@@ -25,6 +26,7 @@ public static ParentReplyInfoResDto toDto(Tuple tuple, String profilePhotoURL, S
                 .content(tuple.get(parentReply.content))
                 .replyId(tuple.get(parentReply.parentReplyId))
                 .timeAgo(timeAgo)
+                .childReplyCnt(childReplyCnt)
                 .build();
     }
 }
diff --git a/src/main/java/me/snaptime/reply/repository/ChildReplyPagingRepository.java b/src/main/java/me/snaptime/reply/repository/ChildReplyPagingRepository.java
index 03aa51c0..abf7bdbd 100644
--- a/src/main/java/me/snaptime/reply/repository/ChildReplyPagingRepository.java
+++ b/src/main/java/me/snaptime/reply/repository/ChildReplyPagingRepository.java
@@ -7,4 +7,6 @@
 public interface ChildReplyPagingRepository {
 
     List<ChildReply> findReplyPage(Long parentReplyId, Long pageNum);
+
+    Long countByParentReplyId(Long parentReplyId);
 }
diff --git a/src/main/java/me/snaptime/reply/repository/impl/ChildReplyPagingRepositoryImpl.java b/src/main/java/me/snaptime/reply/repository/impl/ChildReplyPagingRepositoryImpl.java
index 59a7fb04..9d3f4180 100644
--- a/src/main/java/me/snaptime/reply/repository/impl/ChildReplyPagingRepositoryImpl.java
+++ b/src/main/java/me/snaptime/reply/repository/impl/ChildReplyPagingRepositoryImpl.java
@@ -39,4 +39,14 @@ public List<ChildReply> findReplyPage(Long parentReplyId, Long pageNum) {
 
         return childReplies;
     }
+
+    @Override
+    public Long countByParentReplyId(Long parentReplyId) {
+        Long childReplyCnt = jpaQueryFactory.select( childReply.count() )
+                .from(childReply)
+                .where(childReply.parentReply.parentReplyId.eq(parentReplyId))
+                .fetchOne();
+
+        return childReplyCnt;
+    }
 }
diff --git a/src/main/java/me/snaptime/reply/service/impl/ReplyServiceImpl.java b/src/main/java/me/snaptime/reply/service/impl/ReplyServiceImpl.java
index c84ce757..2b434291 100644
--- a/src/main/java/me/snaptime/reply/service/impl/ReplyServiceImpl.java
+++ b/src/main/java/me/snaptime/reply/service/impl/ReplyServiceImpl.java
@@ -108,7 +108,9 @@ public ParentReplyPagingResDto findParentReplyPage(Long snapId, Long pageNum){
         {
             String profilePhotoURL = urlComponent.makeProfileURL(tuple.get(user.profilePhoto.profilePhotoId));
             String timeAgo = TimeAgoCalculator.findTimeAgo(tuple.get(parentReply.lastModifiedDate));
-            return ParentReplyInfoResDto.toDto(tuple,profilePhotoURL,timeAgo);
+            Long childReplyCnt = childReplyRepository.countByParentReplyId(tuple.get(parentReply.parentReplyId));
+
+            return ParentReplyInfoResDto.toDto(tuple,profilePhotoURL,timeAgo,childReplyCnt);
         }).collect(Collectors.toList());
 
         return ParentReplyPagingResDto.toDto(parentReplyInfoResDtos, hasNextPage);