diff --git a/src/main/java/foregg/foreggserver/converter/NotificationConverter.java b/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
index 7c8e86d..70809b3 100644
--- a/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
+++ b/src/main/java/foregg/foreggserver/converter/NotificationConverter.java
@@ -3,7 +3,6 @@
 import foregg.foreggserver.domain.Notification;
 import foregg.foreggserver.domain.Reply;
 import foregg.foreggserver.domain.enums.NotificationType;
-import foregg.foreggserver.dto.notificationDTO.NotificationResponseDTO;
 import foregg.foreggserver.dto.notificationDTO.NotificationResponseDTO.NotificationDTO;
 import foregg.foreggserver.util.DateUtil;
 
@@ -33,9 +32,9 @@ public static List<NotificationDTO> toNotificationResponse(List<Notification> no
         for (Notification notification : notificationList) {
             NotificationDTO dto = NotificationDTO.builder()
                     .id(notification.getId())
-                    .targetKey(notification.getChallengeId().toString())
+                    .targetKey(notification.getTargetId().toString())
                     .notificationType(notification.getNotificationType())
-                    .sender(notification.getSender().getNickname())
+                    .sender(notification.getSender())
                     .elapsedTime(DateUtil.getElapsedTime(notification.getCreatedAt()))
                     .createdAt(notification.getCreatedAt().toString())
                     .build();
diff --git a/src/main/java/foregg/foreggserver/domain/Notification.java b/src/main/java/foregg/foreggserver/domain/Notification.java
index 8eb3eb4..3e3d995 100644
--- a/src/main/java/foregg/foreggserver/domain/Notification.java
+++ b/src/main/java/foregg/foreggserver/domain/Notification.java
@@ -19,9 +19,8 @@ public class Notification extends BaseEntity {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
-    @ManyToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "sender_id")
-    private User sender;
+    @Column(nullable = false)
+    private String sender;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "receiver_id")
@@ -34,6 +33,6 @@ public class Notification extends BaseEntity {
     private NotificationType notificationType;
 
     @Column(nullable = false)
-    private Long challengeId;
+    private Long targetId;
 }
 
diff --git a/src/main/java/foregg/foreggserver/repository/NotificationRepository.java b/src/main/java/foregg/foreggserver/repository/NotificationRepository.java
index 010c467..3981596 100644
--- a/src/main/java/foregg/foreggserver/repository/NotificationRepository.java
+++ b/src/main/java/foregg/foreggserver/repository/NotificationRepository.java
@@ -11,9 +11,10 @@ public interface NotificationRepository extends JpaRepository<Notification, Long
 
     List<Notification> findBySenderAndReceiverAndDate(User sender, User receiver, String date);
 
-    Notification findBySenderAndReceiverAndDateAndNotificationType(User sender, User receiver, String date, NotificationType notificationType);
+    Notification findBySenderAndReceiverAndDateAndNotificationType(String senderNickname, User receiver, String date, NotificationType notificationType);
 
-    List<Notification> findBySenderAndDateAndNotificationType(User sender, String date, NotificationType notificationType);
+    List<Notification> findBySenderAndDateAndNotificationType(String senderNickname, String date, NotificationType notificationType);
 
     List<Notification> findByReceiver(User receiver);
+
 }
diff --git a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeQueryService.java b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeQueryService.java
index 75c9195..bcd05eb 100644
--- a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeQueryService.java
+++ b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeQueryService.java
@@ -99,9 +99,9 @@ public List<ChallengeParticipantsDTO> getParticipants(Long challengeId, boolean
         for (ChallengeParticipation cp : challengeParticipations) {
             Notification notification;
             if (isSuccess) {
-                notification = notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(currentUser, cp.getUser(), LocalDate.now().toString(), NotificationType.CLAP);
+                notification = notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(currentUser.getChallengeName(), cp.getUser(), LocalDate.now().toString(), NotificationType.CLAP);
             } else {
-                notification = notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(currentUser, cp.getUser(), LocalDate.now().toString(), NotificationType.SUPPORT);
+                notification = notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(currentUser.getChallengeName(), cp.getUser(), LocalDate.now().toString(), NotificationType.SUPPORT);
             }
             if (notification == null) {
                 result.add(ChallengeConverter.toChallengeParticipantDTO(cp, false));
diff --git a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
index 64e2e83..3d4c797 100644
--- a/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
+++ b/src/main/java/foregg/foreggserver/service/challengeService/ChallengeService.java
@@ -173,16 +173,16 @@ public void cheer(Long receiverId, NotificationType type, Long challengeId) {
 
         catchCheerException(challengeParticipation, type);
 
-        List<Notification> notificationList = notificationRepository.findBySenderAndDateAndNotificationType(sender, LocalDate.now().toString(), type);
+        List<Notification> notificationList = notificationRepository.findBySenderAndDateAndNotificationType(sender.getChallengeName(), LocalDate.now().toString(), type);
         if (notificationList.size() >= 3) {
             throw new ChallengeHandler(NO_MORE_THAN_THIRD_TIME);
         }
 
-        if (notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(sender, receiver, LocalDate.now().toString(), type) != null) {
+        if (notificationRepository.findBySenderAndReceiverAndDateAndNotificationType(sender.getChallengeName(), receiver, LocalDate.now().toString(), type) != null) {
             throw new ChallengeHandler(ALREADY_SEND_CHEER);
         }
 
-        Notification notification = notificationService.createNotification(type, receiver, sender, challengeId);
+        Notification notification = notificationService.createNotification(type, receiver, sender.getChallengeName(), challengeId);
         notificationRepository.save(notification);
     }
 
diff --git a/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java b/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
index 582e065..aefc961 100644
--- a/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
+++ b/src/main/java/foregg/foreggserver/service/dailyService/DailyService.java
@@ -6,16 +6,19 @@
 import foregg.foreggserver.converter.DailyConverter;
 import foregg.foreggserver.domain.*;
 import foregg.foreggserver.domain.Record;
+import foregg.foreggserver.domain.enums.NotificationType;
 import foregg.foreggserver.dto.dailyDTO.DailyRequestDTO;
 import foregg.foreggserver.dto.dailyDTO.DailyRequestDTO.DailyReplyRequestDTO;
 import foregg.foreggserver.dto.dailyDTO.SideEffectRequestDTO;
 import foregg.foreggserver.dto.dailyDTO.SideEffectResponseDTO;
 import foregg.foreggserver.jwt.SecurityUtil;
 import foregg.foreggserver.repository.DailyRepository;
+import foregg.foreggserver.repository.NotificationRepository;
 import foregg.foreggserver.repository.ReplyRepository;
 import foregg.foreggserver.repository.SideEffectRepository;
 import foregg.foreggserver.service.fcmService.FcmService;
 import foregg.foreggserver.service.myPageService.MyPageQueryService;
+import foregg.foreggserver.service.notificationService.NotificationService;
 import foregg.foreggserver.service.recordService.RecordQueryService;
 import foregg.foreggserver.service.s3Service.S3Service;
 import foregg.foreggserver.service.userService.UserQueryService;
@@ -48,6 +51,8 @@ public class DailyService {
     private final MyPageQueryService myPageQueryService;
     private final S3Service s3Service;
     private final ReplyRepository replyRepository;
+    private final NotificationService notificationService;
+    private final NotificationRepository notificationRepository;
 
     public void writeDaily(DailyRequestDTO dto, String imageUrl) {
         User user = userQueryService.getUser();
@@ -94,6 +99,8 @@ public void reply(DailyReplyRequestDTO dto) {
                 .build();
         replyRepository.save(reply);
         daily.setReply(reply);
+        Notification notification = notificationService.createNotification(NotificationType.REPLY, wife, userQueryService.getUser().getNickname(), daily.getId());
+        notificationRepository.save(notification);
     }
 
     public void writeSideEffect(SideEffectRequestDTO dto) {
diff --git a/src/main/java/foregg/foreggserver/service/notificationService/NotificationService.java b/src/main/java/foregg/foreggserver/service/notificationService/NotificationService.java
index d1f2bb5..8b10625 100644
--- a/src/main/java/foregg/foreggserver/service/notificationService/NotificationService.java
+++ b/src/main/java/foregg/foreggserver/service/notificationService/NotificationService.java
@@ -182,13 +182,13 @@ public void cancelScheduledTasks(Long recordId) {
     }
 
     //알림 만드는 로직
-    public Notification createNotification(NotificationType notificationType, User receiver, User sender, Long challengeId) {
+    public Notification createNotification(NotificationType notificationType, User receiver, String sender, Long targetId) {
         return Notification.builder()
                 .notificationType(notificationType)
                 .receiver(receiver)
                 .sender(sender)
                 .date(LocalDate.now().toString())
-                .challengeId(challengeId)
+                .targetId(targetId)
                 .build();
     }