diff --git a/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/repository/SharingSympathyRepository.java b/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/repository/SharingSympathyRepository.java
index e08eb8c..7988fe3 100644
--- a/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/repository/SharingSympathyRepository.java
+++ b/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/repository/SharingSympathyRepository.java
@@ -14,6 +14,9 @@ public interface SharingSympathyRepository extends JpaRepository<SharingSympathy
     User findByUserId(@Param("user_id") Long user_id);
     @Query("SELECT sb FROM SharingBoard sb WHERE sb.id = :sharing_board_id")
     SharingBoard findBySharingBoardId(@Param("sharing_board_id") Long sharing_board_id);
+    @Query(value = "SELECT sharing_sympathy.* FROM sharing_sympathy WHERE sharing_sympathy.sharing_board_id = :sharing_board_id", nativeQuery = true)
+    SharingSympathy findBySharingBoardId(@Param("sharing_board_id") SharingBoard sharing_board_id);
+
 
     int countAllBySharingBoardId(Long sharing_board_id);
     int countAllByUserId(Long userId);
diff --git a/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/service/SharingSympathyService.java b/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/service/SharingSympathyService.java
index 9b9bbc9..3b78d48 100644
--- a/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/service/SharingSympathyService.java
+++ b/src/main/java/com/umc/DongnaeFriend/domain/account/sharing/service/SharingSympathyService.java
@@ -19,15 +19,25 @@ public String newSympathy(Long accountBookId){
         // 게시판 가져오기
         SharingBoard sharingBoard = sharingSympathyRepository.findBySharingBoardId(accountBookId);
 
-        // 공감 데이터 저장하기
-        SharingSympathy sharingSympathy = SharingSympathy.builder()
-                .sharingBoard(sharingBoard)
-                .user(user)
-                .build();
+        // 공감 유무 확인하기
+        SharingSympathy sharingSympathyExist = sharingSympathyRepository.findBySharingBoardId(sharingBoard);
 
-        sharingSympathyRepository.save(sharingSympathy);
+        if (sharingSympathyExist == null) {
+            // 공감 데이터 저장하기
+            SharingSympathy sharingSympathy = SharingSympathy.builder()
+                    .sharingBoard(sharingBoard)
+                    .user(user)
+                    .build();
 
-        return "[가계부 공유] 공감 성공";
+            sharingSympathyRepository.save(sharingSympathy);
+
+            return "[가계부 공유] 공감 성공";
+        }
+
+        // 공감 데이터 삭제하기
+        sharingSympathyRepository.delete(sharingSympathyExist);
+
+        return "[가계부 공유] 공감 삭제 성공";
     }
 
 }