diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
index bf47f966..46d87577 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
@@ -135,12 +135,7 @@
           "
           class="member-state-msg text-warn-color"
         >
-          <span *ngIf="roomInfoSubject.value.roomType === RoomType.Single">
-            {{ 'chat.existOfflineUser' | translate }}
-          </span>
-          <span *ngIf="roomInfoSubject.value.roomType === RoomType.Multi">
-            {{ 'chat.existOfflineUsers' | translate }}
-          </span>
+          {{ getOfflineString() }}
         </div>
       </div>
       <div class="room-option">
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
index 47561ae1..369262fb 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
@@ -354,18 +354,33 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
       .pipe(
         tap(([userInfoList, presences]) => {
           if (!!userInfoList && userInfoList.length > 0) {
-            userInfoList.forEach(userInfo => {
-              const presence = presences[userInfo.seq];
+            userInfoList
+              .filter(
+                info =>
+                  info.seq !== this.loginResSubject.value.userSeq &&
+                  !!info.isJoinRoom
+              )
+              .forEach(userInfo => {
+                const presence = presences[userInfo.seq];
+                const existIndex = !!this.offLineUsers
+                  ? this.offLineUsers.findIndex(e => e.seq === userInfo.seq)
+                  : -1;
 
-              if (
-                !!presence &&
-                presence.pcStatus === PresenceStatusCode.OnLine
-              ) {
-              } else {
-                this.offLineUsers.push(userInfo);
-              }
-            });
+                if (
+                  !!presence &&
+                  presence.pcStatus === PresenceStatusCode.OnLine
+                ) {
+                  if (existIndex > -1) {
+                    this.offLineUsers.splice(existIndex, 1);
+                  }
+                } else {
+                  if (existIndex === -1) {
+                    this.offLineUsers.push(userInfo);
+                  }
+                }
+              });
           }
+          console.log(this.offLineUsers);
         })
       )
       .subscribe();
@@ -619,6 +634,31 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
     }
   }
 
+  getOfflineString() {
+    let offlineStr = '';
+    if (!!this.offLineUsers && this.offLineUsers.length > 0) {
+      if (
+        !!this.roomInfoSubject.value &&
+        this.roomInfoSubject.value.roomType === RoomType.Single
+      ) {
+        const name = new UiTranslatePipe(
+          this.uiTranslateService,
+          this.changeDetectorRef
+        ).transform(this.offLineUsers[0], 'name');
+
+        offlineStr = this.translateService.instant('chat.existOfflineUser', {
+          offlineUser: name
+        });
+      } else if (
+        !!this.roomInfoSubject.value &&
+        this.roomInfoSubject.value.roomType === RoomType.Multi
+      ) {
+        offlineStr = this.translateService.instant('chat.existOfflineUsers');
+      }
+    }
+    return offlineStr;
+  }
+
   onClickSendClickToCall(type: string) {
     if (type === 'LINE') {
       this.sendCall.emit(this._roomUserInfos[0].lineNumber);
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/en.json b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
index bccd8684..9a3a1546 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/en.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
@@ -238,8 +238,8 @@
     "btnSticker": "Sticker",
     "btnTranslate": "Translate",
     "noRoomUser": "No chat users",
-    "existOfflineUser": "offline",
-    "existOfflineUsers": "Some offline",
+    "existOfflineUser": "{{offlineUser}} may not respond because it is [offline].",
+    "existOfflineUsers": "Some chat partners may not respond because they are not online.",
     "event": {
       "inviteToRoomWith": "{{owner}} invited {{inviter}}.",
       "exitFromRoomWith": "{{exitor}} has left.",
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
index c9afcd7e..5480cc4c 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
@@ -238,8 +238,8 @@
     "btnSticker": "스티커",
     "btnTranslate": "번역",
     "noRoomUser": "대화상대 없음",
-    "existOfflineUser": "오프라인 입니다.",
-    "existOfflineUsers": "일부 인원이 오프라인 입니다.",
+    "existOfflineUser": "{{offlineUser}}님이 [오프라인]이므로 응답하지 않을 수도 있습니다.",
+    "existOfflineUsers": "일부 대화상대는 온라인 상태가 아니어서 응답하지 않을 수도 있습니다.",
     "event": {
       "inviteToRoomWith": "{{owner}}이 {{inviter}}을 초대했습니다.",
       "exitFromRoomWith": "{{exitor}}님이 퇴장하셨습니다.",