diff --git a/projects/ucap-webmessenger-protocol-room/src/lib/models/room-invite.ts b/projects/ucap-webmessenger-protocol-room/src/lib/models/room-invite.ts
new file mode 100644
index 00000000..8be64b05
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-room/src/lib/models/room-invite.ts
@@ -0,0 +1,50 @@
+import {
+  ProtocolRequest,
+  ProtocolResponse,
+  ProtocolEncoder,
+  PacketBody,
+  PacketBodyValue,
+  ProtocolDecoder,
+  ProtocolMessage
+} from '@ucap-webmessenger/protocol';
+
+export interface RoomInviteRequest extends ProtocolRequest {
+  // 0. 대화방SEQ(s)
+  roomSeq: string;
+  // 1n. 초대자 userSeq(n)...
+  inviteUserSeqs: number[];
+}
+
+export interface RoomInviteResponse extends ProtocolResponse {
+  // 0. 대화방SEQ(s)
+  roomSeq: string;
+}
+
+export const encodeRoomInvite: ProtocolEncoder<RoomInviteRequest> = (
+  req: RoomInviteRequest
+) => {
+  const bodyList: PacketBody[] = [];
+
+  bodyList.push({ type: PacketBodyValue.String, value: req.roomSeq });
+  for (const userSeq of req.inviteUserSeqs) {
+    bodyList.push({ type: PacketBodyValue.Integer, value: userSeq });
+  }
+
+  return bodyList;
+};
+
+export const decodeRoomInvite: ProtocolDecoder<RoomInviteResponse> = (
+  message: ProtocolMessage
+) => {
+  return {
+    roomSeq: message.bodyList[0]
+  } as RoomInviteResponse;
+};
+
+export const decodeRoomInviteNotification: ProtocolDecoder<
+  RoomInviteResponse
+> = (message: ProtocolMessage) => {
+  return {
+    roomSeq: message.bodyList[0]
+  } as RoomInviteResponse;
+};
diff --git a/projects/ucap-webmessenger-protocol-room/src/lib/services/room-protocol.service.ts b/projects/ucap-webmessenger-protocol-room/src/lib/services/room-protocol.service.ts
index af9438c3..a4e58029 100644
--- a/projects/ucap-webmessenger-protocol-room/src/lib/services/room-protocol.service.ts
+++ b/projects/ucap-webmessenger-protocol-room/src/lib/services/room-protocol.service.ts
@@ -9,7 +9,8 @@ import {
   SSVC_TYPE_ROOM_OPEN_REQ,
   SSVC_TYPE_ROOM_OPEN2_REQ,
   SSVC_TYPE_ROOM_OPEN3_REQ,
-  SSVC_TYPE_ROOM_OPEN4_REQ
+  SSVC_TYPE_ROOM_OPEN4_REQ,
+  SSVC_TYPE_ROOM_INVITE_REQ
 } from '../types/service';
 import {
   RoomOpenRequest,
@@ -35,6 +36,12 @@ import {
   encodeRoomOpen4,
   decodeRoomOpen4
 } from '../models/room-open4';
+import {
+  RoomInviteRequest,
+  RoomInviteResponse,
+  encodeRoomInvite,
+  decodeRoomInvite
+} from '../models/room-invite';
 
 @Injectable({
   providedIn: 'root'
@@ -77,4 +84,13 @@ export class RoomProtocolService {
         map(res => decodeRoomOpen4(res))
       );
   }
+
+  public roomInvite(req: RoomInviteRequest): Observable<RoomInviteResponse> {
+    return this.protocolService
+      .call(SVC_TYPE_ROOM, SSVC_TYPE_ROOM_INVITE_REQ, ...encodeRoomInvite(req))
+      .pipe(
+        take(1),
+        map(res => decodeRoomInvite(res))
+      );
+  }
 }