diff --git a/src/web/app/common/scripts/streaming/stream.ts b/src/web/app/common/scripts/streaming/stream.ts
index 189af0ab30..cb4041fd89 100644
--- a/src/web/app/common/scripts/streaming/stream.ts
+++ b/src/web/app/common/scripts/streaming/stream.ts
@@ -22,6 +22,7 @@ export default class Connection extends EventEmitter {
 		data: string
 	}> = [];
 	public id: string;
+	public isSuspended = false;
 	private os: MiOS;
 
 	constructor(os: MiOS, endpoint, params?) {
@@ -91,6 +92,8 @@ export default class Connection extends EventEmitter {
 	 * Callback of when received a message from connection
 	 */
 	private onMessage(message) {
+		if (this.isSuspended) return;
+
 		if (this.os.debug) {
 			this.in++;
 			this.inout.push({ type: 'in', at: new Date(), data: message.data });
@@ -108,6 +111,8 @@ export default class Connection extends EventEmitter {
 	 * Send a message to connection
 	 */
 	public send(data) {
+		if (this.isSuspended) return;
+
 		// まだ接続が確立されていなかったらバッファリングして次に接続した時に送信する
 		if (this.state != 'connected') {
 			this.buffer.push(data);
diff --git a/src/web/app/desktop/views/components/taskmanager.vue b/src/web/app/desktop/views/components/taskmanager.vue
index c0a8b2e9ab..a00fabb047 100644
--- a/src/web/app/desktop/views/components/taskmanager.vue
+++ b/src/web/app/desktop/views/components/taskmanager.vue
@@ -94,6 +94,13 @@
 		<el-tab-pane label="Streams (Inspect)">
 			<el-tabs type="card" style="height:50%">
 				<el-tab-pane v-for="c in os.connections" :label="c.name == '' ? '[Home]' : c.name" :key="c.id" :name="c.id" ref="connectionsTab">
+					<div style="padding: 12px 0 0 12px">
+					<el-button size="mini" @click="send(c)">Send</el-button>
+					<el-button size="mini" type="warning" @click="c.isSuspended = true" v-if="!c.isSuspended">Suspend</el-button>
+					<el-button size="mini" type="success" @click="c.isSuspended = false" v-else>Resume</el-button>
+					<el-button size="mini" type="danger" @click="c.close">Disconnect</el-button>
+				</div>
+
 					<el-table
 						:data="c.inout"
 						style="width: 100%"
@@ -177,6 +184,14 @@ export default Vue.extend({
 		},
 		onWindowsChanged() {
 			this.$forceUpdate();
+		},
+		send(c) {
+			(this as any).apis.input({
+				title: 'Send a JSON message',
+				allowEmpty: false
+			}).then(json => {
+				c.send(JSON.parse(json));
+			});
 		}
 	}
 });