diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
index e1c70420..d31a3b4d 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
@@ -1,25 +1,16 @@
-<div
-  class="oraganization-tab"
-  fxLayout="column"
-  *ngIf="departmentInfoList$ | async"
->
+<div class="oraganization-tab" fxLayout="column" *ngIf="departmentInfoList$ | async">
   <div class="oraganization-tab-tree" fxFlex="50" style="overflow: scroll">
-    <ucap-organization-tree
-      [oraganizationList]="departmentInfoList$ | async"
-      (selected)="onSelectedOrganization($event)"
-    ></ucap-organization-tree>
+    <ucap-organization-tree [oraganizationList]="departmentInfoList$ | async"
+      (selected)="onSelectedOrganization($event)"></ucap-organization-tree>
   </div>
   <div fxFlex="50" style="overflow: scroll">
     <div>
       (선택된부서명)
     </div>
     <div>
-      <ucap-profile-user-list-item
-        *ngFor="let userInfo of selectedDepartmentUserInfoList$ | async"
-        [userInfo]="userInfo"
-        [checkable]="true"
-        [sessionVerinfo]="sessionVerinfo"
-      >
+      <ucap-profile-user-list-item *ngFor="let userInfo of selectedDepartmentUserInfoList$ | async"
+        [userInfo]="userInfo" [checkable]="true" [sessionVerinfo]="sessionVerinfo" [selectedUserList]="selectedUserList"
+        [isChecked]="getCheckedUser(userInfo)" (checkUser)="onCheckUser($event)">
       </ucap-profile-user-list-item>
     </div>
     <div>
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
index 06cecc51..2628f60d 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, Output, EventEmitter, Input } from '@angular/core';
 import { ucapAnimations } from '@ucap-webmessenger/ui';
 import { Observable } from 'rxjs';
 import {
@@ -6,8 +6,11 @@ import {
   QueryProtocolService,
   DeptSearchType,
   UserInfoSS,
-  DeptUserResponse
+  DeptUserResponse,
+  UserInfoF,
+  UserInfoDN
 } from '@ucap-webmessenger/protocol-query';
+import { UserInfo } from '@ucap-webmessenger/protocol-sync';
 import { Store, select } from '@ngrx/store';
 import { NGXLogger } from 'ngx-logger';
 
@@ -26,6 +29,16 @@ import { KEY_VER_INFO } from '@app/types/ver-info.type';
   animations: ucapAnimations
 })
 export class OrganizationComponent implements OnInit {
+  @Input()
+  /** 선택된 사용자의 리스트 */
+  selectedUserList?: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[] = [];
+
+  @Output()
+  checkUser = new EventEmitter<{
+    isChecked: boolean;
+    userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN;
+  }>();
+
   departmentInfoList$: Observable<DeptInfo[]>;
   selectedDepartmentUserInfoList$: Observable<UserInfoSS[]>;
   selectedDepartmentStatus$: Observable<DeptUserResponse>;
@@ -76,6 +89,16 @@ export class OrganizationComponent implements OnInit {
       .subscribe();
   }
 
+  getCheckedUser(userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN) {
+    if (!!this.selectedUserList && this.selectedUserList.length > 0) {
+      return (
+        this.selectedUserList.filter(item => item.seq === userInfo.seq).length >
+        0
+      );
+    }
+    return false;
+  }
+
   onSelectedOrganization(deptInfo: DeptInfo) {
     this.store
       .pipe(
@@ -97,4 +120,12 @@ export class OrganizationComponent implements OnInit {
       )
       .subscribe();
   }
+
+  onCheckUser(params: {
+    isChecked: boolean;
+    userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN;
+  }) {
+    console.log(this.selectedUserList);
+    this.checkUser.emit(params);
+  }
 }
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 8e632e65..445a0a8a 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
@@ -15,7 +15,8 @@
           <ucap-group-expansion-panel #groupExpansionPanel [groupBuddyList]="groupBuddyList$ | async"
             [favoritBuddyList]="favoritBuddyList$ | async" [checkable]="true" (checkGroup)="onCheckGroup($event)">
             <ucap-profile-user-list-item *ucapGroupExpansionPanelItem="let userInfo" [userInfo]="userInfo"
-              [sessionVerinfo]="sessionVerinfo" (checkUser)="onCheckUser($event)" [checkable]="true">
+              [sessionVerinfo]="sessionVerinfo" [selectedUserList]="selectedUserList"
+              [isChecked]="getCheckedUser(userInfo)" (checkUser)="onCheckUser($event)" [checkable]="true">
             </ucap-profile-user-list-item>
           </ucap-group-expansion-panel>
         </mat-tab>
@@ -23,7 +24,9 @@
           <ng-template mat-tab-label>
             <mat-icon>device_hub</mat-icon>
           </ng-template>
-          <app-layout-chat-left-sidenav-organization></app-layout-chat-left-sidenav-organization>
+          <app-layout-chat-left-sidenav-organization [selectedUserList]="selectedUserList"
+            (checkUser)="onCheckUser($event)">
+          </app-layout-chat-left-sidenav-organization>
         </mat-tab>
         <mat-tab>
           <ng-template mat-tab-label>
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 f6a36312..f1694122 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
@@ -207,7 +207,7 @@ export class CreateChatDialogComponent implements OnInit, OnDestroy {
           this.selectedUserList.filter(user => user.seq === item.seq).length ===
           0
         ) {
-          this.selectedUserList.push(item);
+          this.selectedUserList = [...this.selectedUserList, item];
         }
       });
     } else {
@@ -226,9 +226,10 @@ export class CreateChatDialogComponent implements OnInit, OnDestroy {
     if (params.isChecked) {
       if (
         this.selectedUserList.filter(user => user.seq === params.userInfo.seq)
-          .length === 0
+          .length === 0 &&
+        params.userInfo
       ) {
-        this.selectedUserList.push(params.userInfo);
+        this.selectedUserList = [...this.selectedUserList, params.userInfo];
       }
     } else {
       this.selectedUserList = this.selectedUserList.filter(
@@ -242,4 +243,14 @@ export class CreateChatDialogComponent implements OnInit, OnDestroy {
     //   choice
     // });
   }
+
+  getCheckedUser(userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN) {
+    if (!!this.selectedUserList && this.selectedUserList.length > 0) {
+      return (
+        this.selectedUserList.filter(item => item.seq === userInfo.seq).length >
+        0
+      );
+    }
+    return false;
+  }
 }
diff --git a/projects/ucap-webmessenger-ui-profile/src/lib/components/user-list-item.component.ts b/projects/ucap-webmessenger-ui-profile/src/lib/components/user-list-item.component.ts
index 05a5fdca..0b44d067 100644
--- a/projects/ucap-webmessenger-ui-profile/src/lib/components/user-list-item.component.ts
+++ b/projects/ucap-webmessenger-ui-profile/src/lib/components/user-list-item.component.ts
@@ -48,6 +48,9 @@ export class UserListItemComponent implements OnInit, OnDestroy {
   compactable = false;
   @Input()
   sessionVerinfo: VersionInfo2Response;
+  @Input()
+  /** 선택된 사용자의 리스트 */
+  selectedUserList?: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[] = [];
 
   @Output()
   checkUser = new EventEmitter<{