diff --git a/backend/src/main/java/com/example/Piroin/project/domain/question/dto/QuestionResDTO.java b/backend/src/main/java/com/example/Piroin/project/domain/question/dto/QuestionResDTO.java
index d215530..be6196a 100644
--- a/backend/src/main/java/com/example/Piroin/project/domain/question/dto/QuestionResDTO.java
+++ b/backend/src/main/java/com/example/Piroin/project/domain/question/dto/QuestionResDTO.java
@@ -70,6 +70,7 @@ public record QuestionDetailResponse(
             Boolean isPopular,
             Integer likeCount,
             Boolean isLiked,
+            Boolean isMine,
             LocalDateTime createdAt,
             List<CommentResponse> comments
     ) {
@@ -144,6 +145,7 @@ public record QuestionSummaryResponse(
             Boolean isResolved,
             Boolean isPopular,
             Boolean isLiked,
+            Boolean isMine,
             Integer likeCount,
             Integer commentCount,
             // 댓글이 없으면 빈 배열로 내려가며, 프론트는 빈 배열일 때 미리보기 영역을 숨긴다.
diff --git a/backend/src/main/java/com/example/Piroin/project/domain/question/service/QuestionService.java b/backend/src/main/java/com/example/Piroin/project/domain/question/service/QuestionService.java
index 4955b19..5703f3b 100644
--- a/backend/src/main/java/com/example/Piroin/project/domain/question/service/QuestionService.java
+++ b/backend/src/main/java/com/example/Piroin/project/domain/question/service/QuestionService.java
@@ -77,6 +77,7 @@ public QuestionResDTO.QuestionDetailResponse getQuestionDetail(Long questionId,
 
     private QuestionResDTO.QuestionDetailResponse toDetailResponse(Question question, User loginUser) {
         boolean isLiked = questionLikeRepository.existsByQuestionAndUser(question, loginUser);
+        boolean isMine = question.getUser().getId().equals(loginUser.getId());
         boolean isPopular = !question.getIsResolved() && question.getLikeCount() >= POPULAR_LIKE_THRESHOLD;
 
         List<QuestionComment> topComments =
@@ -89,6 +90,7 @@ private QuestionResDTO.QuestionDetailResponse toDetailResponse(Question question
         return new QuestionResDTO.QuestionDetailResponse(
                 question.getId(), "작성자", question.getContent(), question.getImageUrl(),
                 question.getIsResolved(), isPopular, question.getLikeCount(), isLiked,
+                isMine,
                 question.getCreatedAt(), commentResponses
         );
     }
@@ -495,11 +497,13 @@ private QuestionResDTO.QuestionSummaryResponse toQuestionSummaryResponse (
     ) {
         Long questionId = question.getId();
         boolean isLiked = questionLikeRepository.existsByQuestionAndUser(question, loginUser);
+        boolean isMine = question.getUser().getId().equals(loginUser.getId());
         return new QuestionResDTO.QuestionSummaryResponse(
                 questionId, question.getContent(), question.getImageUrl(),
                 question.getIsResolved(),
                 !question.getIsResolved() && question.getLikeCount() >= POPULAR_LIKE_THRESHOLD,
                 isLiked,
+                isMine,
                 question.getLikeCount(),
                 summaryContext.commentCounts().getOrDefault(questionId, 0),
                 // 목록 화면은 최상위 댓글 중 먼저 달린 3개만 미리보기로 보여준다.