diff --git a/src/main/java/com/moing/backend/domain/missionArchive/application/mapper/MissionArchiveMapper.java b/src/main/java/com/moing/backend/domain/missionArchive/application/mapper/MissionArchiveMapper.java
index 7dc09888..d9c4f86e 100644
--- a/src/main/java/com/moing/backend/domain/missionArchive/application/mapper/MissionArchiveMapper.java
+++ b/src/main/java/com/moing/backend/domain/missionArchive/application/mapper/MissionArchiveMapper.java
@@ -29,6 +29,7 @@ public static MissionArchive mapToMissionArchive(MissionArchiveReq missionArchiv
                 .mission(mission)
                 .heartList(new ArrayList<>())
                 .contents(missionArchiveReq.getContents())
+                .commentNum(0L)
                 .build();
     }