diff --git a/src/main/java/com/selfrunner/gwalit/domain/board/dto/response/BoardReplyRes.java b/src/main/java/com/selfrunner/gwalit/domain/board/dto/response/BoardReplyRes.java
index b440a4a4..756ec10d 100644
--- a/src/main/java/com/selfrunner/gwalit/domain/board/dto/response/BoardReplyRes.java
+++ b/src/main/java/com/selfrunner/gwalit/domain/board/dto/response/BoardReplyRes.java
@@ -64,7 +64,7 @@ public BoardReplyRes(Board board, Member member, LocalDate lessonDate, Integer r
         this.category = board.getCategory();
         this.status = board.getStatus();
         this.fileList = fileList;
-        this.replyCount = replyCount;
+        this.replyCount = (replyCount != null) ? replyCount : 0;
         this.createdAt = board.getCreatedAt();
         this.modifiedAt = board.getModifiedAt();
     }
diff --git a/src/main/java/com/selfrunner/gwalit/domain/board/repository/BoardRepositoryImpl.java b/src/main/java/com/selfrunner/gwalit/domain/board/repository/BoardRepositoryImpl.java
index eed23b7a..cb12b089 100644
--- a/src/main/java/com/selfrunner/gwalit/domain/board/repository/BoardRepositoryImpl.java
+++ b/src/main/java/com/selfrunner/gwalit/domain/board/repository/BoardRepositoryImpl.java
@@ -18,6 +18,7 @@
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 import static com.querydsl.core.group.GroupBy.groupBy;
 import static com.selfrunner.gwalit.domain.board.entity.QBoard.board;
@@ -34,13 +35,13 @@ public class BoardRepositoryImpl implements BoardRepositoryCustom {
 
     @Override
     public Slice<BoardMetaRes> findBoardPaginationByCategory(Member m, Long lectureId, BoardCategory category, Long cursor, LocalDateTime cursorCreatedAt, Pageable pageable) {
-        List<BoardMetaRes> content;
+        List<BoardMetaRes> boardMetaResList;
         if (m.getType().equals(MemberType.TEACHER)) {
-            content = queryFactory.selectFrom(board)
+            boardMetaResList = queryFactory.selectFrom(board)
                     .leftJoin(lecture).on(board.lecture.lectureId.eq(lecture.lectureId))
                     .leftJoin(member).on(board.member.memberId.eq(member.memberId))
                     .leftJoin(reply).on(board.boardId.eq(reply.board.boardId))
-                    .where(board.lecture.lectureId.eq(lectureId), eqCursorAndCursorCreatedAt(cursor, cursorCreatedAt), checkCategory(category), board.deletedAt.isNull(), reply.isNull().or(reply.deletedAt.isNull().and(reply.isNotNull())))
+                    .where(board.lecture.lectureId.eq(lectureId), eqCursorAndCursorCreatedAt(cursor, cursorCreatedAt), checkCategory(category), board.deletedAt.isNull())
                     .orderBy(board.createdAt.desc(), board.boardId.asc())
                     .groupBy(board.boardId)
                     .limit(pageable.getPageSize() + 1)
@@ -48,17 +49,26 @@ public Slice<BoardMetaRes> findBoardPaginationByCategory(Member m, Long lectureI
 
         }
         else {
-            content = queryFactory.selectFrom(board)
+            boardMetaResList = queryFactory.selectFrom(board)
                     .leftJoin(lecture).on(board.lecture.lectureId.eq(lecture.lectureId))
                     .leftJoin(member).on(board.member.memberId.eq(member.memberId))
                     .leftJoin(reply).on(board.boardId.eq(reply.board.boardId))
-                    .where(board.lecture.lectureId.eq(lectureId), eqCursorAndCursorCreatedAt(cursor, cursorCreatedAt), board.isPublic.eq(Boolean.TRUE).or(checkWriter(m.getMemberId())), checkCategory(category), board.deletedAt.isNull(), reply.isNull().or(reply.deletedAt.isNull().and(reply.isNotNull())))
+                    .where(board.lecture.lectureId.eq(lectureId), eqCursorAndCursorCreatedAt(cursor, cursorCreatedAt), board.isPublic.eq(Boolean.TRUE).or(checkWriter(m.getMemberId())), checkCategory(category), board.deletedAt.isNull())
                     .orderBy(board.createdAt.desc(), board.boardId.asc())
                     .groupBy(board.boardId)
                     .limit(pageable.getPageSize() + 1)
                     .transform(groupBy(board.boardId).list(Projections.constructor(BoardMetaRes.class, board.boardId, lecture.lectureId, member.memberId, member.type, member.name, board.lessonId, board.title, board.body, board.category, board.status, reply.count(), board.createdAt, board.modifiedAt)));
         }
 
+        List<BoardMetaRes> content = boardMetaResList.stream()
+                .map(boardMetaRes -> {
+                    Long replyCount = queryFactory.select(reply.count())
+                            .from(reply)
+                            .where(reply.board.boardId.eq(boardMetaRes.getBoardId()), reply.deletedAt.isNull())
+                            .fetchFirst();
+                    return new BoardMetaRes(boardMetaRes.getBoardId(), boardMetaRes.getLectureId(), boardMetaRes.getMemberId(), boardMetaRes.getMemberType(), boardMetaRes.getMemberName(), boardMetaRes.getLessonId(), boardMetaRes.getTitle(), boardMetaRes.getBody(), boardMetaRes.getCategory(), boardMetaRes.getStatus(), replyCount, boardMetaRes.getCreatedAt(), boardMetaRes.getModifiedAt());
+                })
+                .collect(Collectors.toList());
 
         // 다음 페이지 존재 여부 계산
         boolean hasNext = false;