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 f26cb875..1a068024 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
@@ -886,13 +886,17 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
           });
 
           if (!!result && !!result.choice && result.choice) {
-            const userSeqs: number[] = [];
+            const userSeqs: number[] = this.userInfoList.map(
+              userInfo => userInfo.seq
+            );
             if (
               !!result.selectedUserList &&
               result.selectedUserList.length > 0
             ) {
-              result.selectedUserList.map(user => {
-                userSeqs.push(user.seq);
+              result.selectedUserList.forEach(user => {
+                if (userSeqs.indexOf(user.seq) < 0) {
+                  userSeqs.push(user.seq);
+                }
               });
             }
 
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
index 560935c2..af0f218b 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
@@ -3,7 +3,7 @@ import {
   OnInit,
   OnDestroy,
   Output,
-  EventEmitter,
+  EventEmitter
 } from '@angular/core';
 import { Subscription } from 'rxjs';
 import { Store, select } from '@ngrx/store';
@@ -21,13 +21,13 @@ import { DialogService } from '@ucap-webmessenger/ui';
 import {
   SelectGroupDialogComponent,
   SelectGroupDialogResult,
-  SelectGroupDialogData,
+  SelectGroupDialogData
 } from '../../dialogs/group/select-group.dialog.component';
 import { GroupDetailData } from '@ucap-webmessenger/protocol-sync';
 import {
   CreateChatDialogComponent,
   CreateChatDialogResult,
-  CreateChatDialogData,
+  CreateChatDialogData
 } from '../../dialogs/chat/create-chat.dialog.component';
 import { UserSelectDialogType } from '@app/types';
 import { LoginResponse } from '@ucap-webmessenger/protocol-authentication';
@@ -36,7 +36,7 @@ import { KEY_LOGIN_RES_INFO } from '@app/types/login-res-info.type';
 @Component({
   selector: 'app-layout-chat-right-drawer-room-user-list',
   templateUrl: './room-user-list.component.html',
-  styleUrls: ['./room-user-list.component.scss'],
+  styleUrls: ['./room-user-list.component.scss']
 })
 export class RoomUserListComponent implements OnInit, OnDestroy {
   @Output()
@@ -105,15 +105,19 @@ export class RoomUserListComponent implements OnInit, OnDestroy {
         title: 'Edit Chat Member',
         curRoomUser: this.userInfoList.filter(
           user => user.seq !== this.loginRes.userSeq
-        ),
-      },
+        )
+      }
     });
 
     if (!!result && !!result.choice && result.choice) {
-      const userSeqs: number[] = [];
+      const userSeqs: number[] = this.userInfoList.map(
+        userInfo => userInfo.seq
+      );
       if (!!result.selectedUserList && result.selectedUserList.length > 0) {
-        result.selectedUserList.map(user => {
-          userSeqs.push(user.seq);
+        result.selectedUserList.forEach(user => {
+          if (userSeqs.indexOf(user.seq) < 0) {
+            userSeqs.push(user.seq);
+          }
         });
       }
 
@@ -125,8 +129,8 @@ export class RoomUserListComponent implements OnInit, OnDestroy {
           RoomStore.inviteOrOpen({
             req: {
               divCd: 'Invite',
-              userSeqs,
-            },
+              userSeqs
+            }
           })
         );
       }
@@ -141,8 +145,8 @@ export class RoomUserListComponent implements OnInit, OnDestroy {
     >(SelectGroupDialogComponent, {
       width: '600px',
       data: {
-        title: 'Group Select',
-      },
+        title: 'Group Select'
+      }
     });
 
     if (!!result && !!result.choice && result.choice) {
@@ -159,7 +163,7 @@ export class RoomUserListComponent implements OnInit, OnDestroy {
         this.store.dispatch(
           SyncStore.updateGroupMember({
             oldGroup,
-            trgtUserSeq,
+            trgtUserSeq
           })
         );
       }
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.html
index 861ad647..a310910a 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.html
@@ -70,9 +70,9 @@
                 <ucap-group-expansion-panel
                   #groupExpansionPanel
                   [groupBuddyList]="groupBuddyList$ | async"
-                  [favoritBuddyList]="favoritBuddyList$ | async"
                   [selectedUserList]="selectedUserList"
                   [checkable]="true"
+                  (checkGroup)="onCheckGroup($event)"
                   class="group-expansion"
                 >
                   <ucap-profile-user-list-item
@@ -138,20 +138,6 @@
               <mat-icon>chat</mat-icon>
             </ng-template>
             <div>
-              <!-- <cdk-virtual-scroll-viewport itemSize="20" style="height: 100%">
-                <ucap-room-list-item
-                  *cdkVirtualFor="let room of roomList"
-                  [loginRes]="loginRes"
-                  [roomInfo]="room"
-                  [roomUserInfo]="getRoomUserList(room)"
-                  [sessionVerinfo]="sessionVerinfo"
-                  [checkable]="getCheckableRoom(room)"
-                  [isChecked]="getCheckedRoom(room)"
-                  [multiCheckable]="false"
-                  (checkRoom)="onCheckRoom($event)"
-                >
-                </ucap-room-list-item>
-              </cdk-virtual-scroll-viewport> -->
               <ucap-room-list-item
                 *ngFor="let room of roomList"
                 [loginRes]="loginRes"
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.ts
index 1adc1bf2..0f88ec7f 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/chat/create-chat.dialog.component.ts
@@ -376,6 +376,7 @@ export class CreateChatDialogComponent implements OnInit, OnDestroy {
     }
   }
 
+  /** 조직도 > 부서원 전체 선택 */
   onCheckAllUser(params: {
     isChecked: boolean;
     userInfos: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[];
diff --git a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.html b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.html
index b5f465bd..7ab7cbe3 100644
--- a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.html
+++ b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.html
@@ -47,27 +47,38 @@
             </mat-icon>
           </button>
           <ng-container [ngSwitch]="node.nodeType">
-            <span *ngSwitchCase="NodeType.Profile">내 프로필</span>
-            <span *ngSwitchCase="NodeType.Favorit"
-              >즐겨찾기
-              <span class="text-accent-color number"
-                >({{ node.countOfChildren }}명)</span
+            <span *ngSwitchCase="NodeType.Profile">
+              <span class="title-name ellipsis">내 프로필</span>
+            </span>
+            <span *ngSwitchCase="NodeType.Favorit">
+              <span class="title-name ellipsis">즐겨찾기</span>
+              <span class="text-accent-color number">
+                ({{ node.countOfChildren }}명)</span
               ></span
             >
             <span *ngSwitchCase="NodeType.Buddy">
               <span class="title-name ellipsis">{{
                 node.groupDetail.name
               }}</span>
-              <span class="text-accent-color number"
-                >({{ node.countOfChildren }}명)</span
+              <span class="text-accent-color number">
+                ({{ node.countOfChildren }}명)</span
               >
             </span>
           </ng-container>
 
+          <mat-checkbox
+            *ngIf="checkable"
+            #checkbox
+            [checked]="getCheckedGroup(node.groupDetail)"
+            (change)="onChangeCheck(checkbox.checked, node.groupDetail)"
+            (click)="$event.stopPropagation()"
+            class="group-check"
+          >
+          </mat-checkbox>
           <button
             mat-icon-button
             aria-label="group menu"
-            *ngIf="node.nodeType !== NodeType.Profile"
+            *ngIf="node.nodeType !== NodeType.Profile && !checkable"
             (click)="onClickMore($event, node.groupDetail)"
             class="group-menu"
           >
diff --git a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.scss b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.scss
index d926c42a..ce7b7fd2 100644
--- a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.scss
+++ b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.scss
@@ -64,6 +64,11 @@
     line-height: 20px;
     margin-right: 10px;
   }
+  .group-check {
+    margin-left: auto;
+    margin-right: 16px;
+  }
+
   .group-menu {
     margin-left: auto;
     opacity: 0.6;
diff --git a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.ts b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.ts
index 8c4f1aef..d03dd551 100644
--- a/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.ts
+++ b/projects/ucap-webmessenger-ui-group/src/lib/components/expansion-panel.component.ts
@@ -108,6 +108,8 @@ export class ExpansionPanelComponent
       return;
     }
 
+    this.groupList = list;
+
     this.buddyNodes = [];
 
     for (const item of list) {
@@ -179,6 +181,8 @@ export class ExpansionPanelComponent
   treeFlattener: MatTreeFlattener<GroupNode, FlatNode>;
   dataSource: VirtualScrollTreeFlatDataSource<GroupNode, FlatNode>;
 
+  groupList: { group: GroupDetailData; buddyList: UserInfo[] }[];
+
   constructor(
     private changeDetectorRef: ChangeDetectorRef,
     private logger: NGXLogger
@@ -237,30 +241,34 @@ export class ExpansionPanelComponent
   }
 
   /** 그룹리스트가 checkable 할 경우 checkbox 의 change 이벤트를 상위 컴포넌트로 전달한다. */
-  onChangeCheck(
-    value: boolean,
-    groupBuddyList: { group: GroupDetailData; buddyList: UserInfo[] }
-  ) {
-    this.checkGroup.emit({
-      isChecked: value,
-      groupBuddyList
-    });
+  onChangeCheck(value: boolean, group: GroupDetailData, nodeType: NodeType) {
+    const groupInfos = this.groupList.filter(
+      groupInfo => groupInfo.group.seq === group.seq
+    );
+
+    if (groupInfos.length > 0) {
+      this.checkGroup.emit({
+        isChecked: value,
+        groupBuddyList: groupInfos[0]
+      });
+    }
   }
 
   /** 그룹리스트가 checkable 할 경우 checkbox 의 isChecked 를 관장하며, 하위 부서원들의 전체선택여부를 판단한다. */
-  getCheckedGroup(groupBuddy: {
-    group: GroupDetailData;
-    buddyList: UserInfo[];
-  }) {
-    if (groupBuddy.buddyList.length === 0) {
+  getCheckedGroup(group: GroupDetailData) {
+    if (!group || group === undefined) {
       return false;
     }
+
+    if (group.userSeqs.length === 0) {
+      return false;
+    }
+
     if (!!this.selectedUserList && this.selectedUserList.length > 0) {
       let allExist = true;
-      groupBuddy.buddyList.some(groupUser => {
+      group.userSeqs.some(seq => {
         if (
-          this.selectedUserList.filter(item => item.seq === groupUser.seq)
-            .length === 0
+          this.selectedUserList.filter(item => item.seq === seq).length === 0
         ) {
           allExist = false;
           return true;