diff --git a/src/main/java/igoMoney/BE/repository/RecordRepository.java b/src/main/java/igoMoney/BE/repository/RecordRepository.java
index 0013033..a48b5e2 100644
--- a/src/main/java/igoMoney/BE/repository/RecordRepository.java
+++ b/src/main/java/igoMoney/BE/repository/RecordRepository.java
@@ -11,8 +11,11 @@
 public interface RecordRepository extends JpaRepository<Record, Long> {
     List<Record> findAllByUserIdAndDate(Long userId, LocalDate date);
 
+    @Query(value="SELECT r.user_id, SUM(r.cost) FROM record r WHERE r.challenge_id= :challengeId AND r.user_id= :userId", nativeQuery = true)
+    List<Object[]> calculateTotalCostByUserId(@Param("challengeId") Long challengeId, @Param("userId")Long userId);
+
     @Query(value="SELECT r.user_id, SUM(r.cost) FROM record r WHERE r.challenge_id= :challengeId GROUP BY r.user_id", nativeQuery = true)
-    List<Object[]> calculateTotalCostByUserId(@Param("challengeId") Long challengeId);
+    List<Object[]> calculateTotalCostByChallengeId(@Param("challengeId") Long challengeId);
 
     List<Record> findAllByUserId(Long userId);
     @Query(value="SELECT COUNT(*) FROM record r WHERE r.user_id= :userId AND r.date >= DATE_SUB(:date,INTERVAL 3 DAY)", nativeQuery = true)
diff --git a/src/main/java/igoMoney/BE/service/ChallengeService.java b/src/main/java/igoMoney/BE/service/ChallengeService.java
index de3ea8a..6b7737b 100644
--- a/src/main/java/igoMoney/BE/service/ChallengeService.java
+++ b/src/main/java/igoMoney/BE/service/ChallengeService.java
@@ -230,9 +230,9 @@ public ChallengeTotalCostResponse getTotalCostPerChallengeUser(Long challengeId,
 
         User findUser = getUserOrThrow(userId);
         checkIfUserInTheChallenge(userId, challengeId);
-        List<Object[]> obs =  recordRepository.calculateTotalCostByUserId(challengeId);
+        List<Object[]> obs =  recordRepository.calculateTotalCostByUserId(challengeId, userId);
         Integer cost = 0;
-        if(obs.size() != 0){
+        if(obs.size() != 0 && obs.get(0)[1]!=null){
             cost = ((BigDecimal) obs.get(0)[1]).intValue(); // BigInteger
         }
         ChallengeTotalCostResponse response = ChallengeTotalCostResponse.builder()
@@ -257,7 +257,7 @@ public void finishChallenge() {
                 c.finishChallenge();
 
                 // 챌린지 승자 결정
-                List<Object[]> totalCosts =  recordRepository.calculateTotalCostByUserId(c.getId());
+                List<Object[]> totalCosts =  recordRepository.calculateTotalCostByChallengeId(c.getId());
                 for (Object[] obj: totalCosts){
                     if(((BigDecimal) obj[1]).intValue() == minCost){
                         check = true;