diff --git a/src/main/java/EatPic/spring/domain/comment/converter/CommentConverter.java b/src/main/java/EatPic/spring/domain/comment/converter/CommentConverter.java
index 5fa7aef..f7c5e06 100644
--- a/src/main/java/EatPic/spring/domain/comment/converter/CommentConverter.java
+++ b/src/main/java/EatPic/spring/domain/comment/converter/CommentConverter.java
@@ -10,9 +10,10 @@
 import java.util.List;
 
 public class CommentConverter {
-    public static Comment WriteCommentDtoToComment(CommentRequestDTO.WriteCommentDto writeCommentDto, Card card, User user) {
+    public static Comment WriteCommentDtoToComment(CommentRequestDTO.WriteCommentDto writeCommentDto, Card card, User user, Comment parentComment) {
         return Comment.builder()
                 .card(card)
+                .parentComment(parentComment)
                 .user(user)
                 .content(writeCommentDto.getContent())
                 .build();
@@ -24,6 +25,7 @@ public static CommentResponseDTO.WriteCommentResponseDTO CommentToWriteCommentRe
                 .parentCommentId(comment.getParentComment()==null?null:comment.getParentComment().getId())
                 .cardId(comment.getCard().getId())
                 .content(comment.getContent())
+                .userId(comment.getUser().getId())
                 .build();
     }
 
diff --git a/src/main/java/EatPic/spring/domain/comment/dto/CommentRequestDTO.java b/src/main/java/EatPic/spring/domain/comment/dto/CommentRequestDTO.java
index 24bd5d9..3cb84ac 100644
--- a/src/main/java/EatPic/spring/domain/comment/dto/CommentRequestDTO.java
+++ b/src/main/java/EatPic/spring/domain/comment/dto/CommentRequestDTO.java
@@ -15,7 +15,6 @@ public class CommentRequestDTO {
     @AllArgsConstructor
     @NoArgsConstructor
     public static class WriteCommentDto{
-        @NotNull
         private Long parentCommentId;
 
         @NotBlank(message = "내용은 필수입니다.")
diff --git a/src/main/java/EatPic/spring/domain/comment/service/CommentServiceImpl.java b/src/main/java/EatPic/spring/domain/comment/service/CommentServiceImpl.java
index 847ab8f..e1b2c24 100644
--- a/src/main/java/EatPic/spring/domain/comment/service/CommentServiceImpl.java
+++ b/src/main/java/EatPic/spring/domain/comment/service/CommentServiceImpl.java
@@ -43,8 +43,8 @@ public Comment writeComment(HttpServletRequest request, CommentRequestDTO.WriteC
         // 카드(피드)
         Card card = cardRepository.findById(cardId)
                 .orElseThrow(() -> new ExceptionHandler(CARD_NOT_FOUND));
-
-        Comment comment = CommentConverter.WriteCommentDtoToComment(writeCommentDto,card,user);
+        Comment parentComment = writeCommentDto.getParentCommentId()!=null?commentRepository.findById(writeCommentDto.getParentCommentId()).orElseThrow(()->new ExceptionHandler(COMMENT_NOT_FOUND)) : null;
+        Comment comment = CommentConverter.WriteCommentDtoToComment(writeCommentDto,card,user, parentComment);
         commentRepository.save(comment);
 
         return comment;