diff --git a/src/main/java/com/sparksInTheStep/webBoard/comment/application/CommentService.java b/src/main/java/com/sparksInTheStep/webBoard/comment/application/CommentService.java
index c587b52..76001be 100644
--- a/src/main/java/com/sparksInTheStep/webBoard/comment/application/CommentService.java
+++ b/src/main/java/com/sparksInTheStep/webBoard/comment/application/CommentService.java
@@ -26,17 +26,12 @@ public class CommentService {
 
     @Transactional(readOnly = true)
     public Page<CommentInfo> readCommentsByPostId(Long postId, Pageable pageable){
-        if(isExistId(postId)){
+        if(postRepository.existsById(postId)){
             return commentRepository.findAllByPostId(postId, pageable).map(CommentInfo::from);
         }
         throw CustomException.of(PostErrorCode.NOT_FOUND);
     }
 
-    @Transactional(readOnly = true)
-    protected boolean isExistId(Long id){
-        return commentRepository.existsById(id);
-    }
-
     @Transactional
     public void makeNewComment(CommentCommand commentCommand, String nickname){
         commentRepository.save(Comment.of(