diff --git a/app/src/main/java/jp/co/cyberagent/stf/Service.java b/app/src/main/java/jp/co/cyberagent/stf/Service.java
index aab3365..70af29a 100644
--- a/app/src/main/java/jp/co/cyberagent/stf/Service.java
+++ b/app/src/main/java/jp/co/cyberagent/stf/Service.java
@@ -51,6 +51,7 @@
 import jp.co.cyberagent.stf.query.GetDisplayResponder;
 import jp.co.cyberagent.stf.query.GetPropertiesResponder;
 import jp.co.cyberagent.stf.query.GetRingerModeResponder;
+import jp.co.cyberagent.stf.query.GetRootStatusResponder;
 import jp.co.cyberagent.stf.query.GetSdStatusResponder;
 import jp.co.cyberagent.stf.query.GetVersionResponder;
 import jp.co.cyberagent.stf.query.GetWifiStatusResponder;
@@ -340,6 +341,9 @@ public void run() {
                     router.register(Wire.MessageType.GET_BLUETOOTH_STATUS,
                         new GetBluetoothStatusResponder(getBaseContext()));
 
+                    router.register(Wire.MessageType.GET_ROOT_STATUS,
+                        new GetRootStatusResponder(getBaseContext()));
+
                     router.register(Wire.MessageType.SET_CLIPBOARD,
                             new SetClipboardResponder(getBaseContext()));
 
diff --git a/app/src/main/java/jp/co/cyberagent/stf/query/GetRootStatusResponder.java b/app/src/main/java/jp/co/cyberagent/stf/query/GetRootStatusResponder.java
new file mode 100644
index 0000000..dd929d0
--- /dev/null
+++ b/app/src/main/java/jp/co/cyberagent/stf/query/GetRootStatusResponder.java
@@ -0,0 +1,77 @@
+package jp.co.cyberagent.stf.query;
+
+import android.content.Context;
+
+import com.google.protobuf.GeneratedMessageLite;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStreamReader;
+
+import jp.co.cyberagent.stf.proto.Wire;
+
+public class GetRootStatusResponder extends AbstractResponder {
+    public GetRootStatusResponder(Context context) {
+        super(context);
+    }
+
+    @Override
+    public GeneratedMessageLite respond(Wire.Envelope envelope) {
+        boolean rootFlag = isDeviceRooted();
+
+        return Wire.Envelope.newBuilder()
+            .setId(envelope.getId())
+            .setType(Wire.MessageType.GET_ROOT_STATUS)
+            .setMessage(Wire.GetRootStatusResponse.newBuilder()
+                .setSuccess(true)
+                .setStatus(rootFlag)
+                .build()
+                .toByteString())
+            .build();
+    }
+
+    @Override
+    public void cleanup() {
+        // No-op
+    }
+
+    public static boolean isDeviceRooted() {
+        return checkRootMethod1() || checkRootMethod2() || checkRootMethod3();
+    }
+
+    private static boolean checkRootMethod1() {
+        String buildTags = android.os.Build.TAGS;
+        return buildTags != null && buildTags.contains("test-keys");
+    }
+
+    private static boolean checkRootMethod2() {
+        String[] paths = { "/system/app/Superuser.apk", "/sbin/su", "/system/bin/su", "/system/xbin/su", "/data/local/xbin/su", "/data/local/bin/su", "/system/sd/xbin/su",
+            "/system/bin/failsafe/su", "/data/local/su", "/su/bin/su"};
+        for (String path : paths) {
+            if (new File(path).exists()) return true;
+        }
+        return false;
+    }
+
+    private static boolean checkRootMethod3() {
+        Process process = null;
+        BufferedReader in = null;
+        try {
+            process = Runtime.getRuntime().exec(new String[] { "/system/xbin/which", "su" });
+            in = new BufferedReader(new InputStreamReader(process.getInputStream()));
+            if (in.readLine() != null) return true;
+            return false;
+        } catch (Throwable t) {
+            return false;
+        } finally {
+            if (in != null) {
+                try  {
+                    in.close();
+                } catch (Exception ignore) {
+                    // Nothing to do
+                }
+            }
+            if (process != null) process.destroy();
+        }
+    }
+}
diff --git a/app/src/main/proto/wire.proto b/app/src/main/proto/wire.proto
index 26e4c33..a0e12c7 100644
--- a/app/src/main/proto/wire.proto
+++ b/app/src/main/proto/wire.proto
@@ -21,6 +21,7 @@ enum MessageType {
     GET_VERSION = 8;
     GET_WIFI_STATUS = 23;
     GET_BLUETOOTH_STATUS = 29;
+    GET_ROOT_STATUS = 31;
     SET_CLIPBOARD = 9;
     SET_KEYGUARD_STATE = 10;
     SET_RINGER_MODE = 21;
@@ -248,6 +249,14 @@ message GetWifiStatusResponse {
     required bool status = 2;
 }
 
+message GetRootStatusRequest {
+}
+
+message GetRootStatusResponse {
+    required bool success = 1;
+    required bool status = 2;
+}
+
 message SetBluetoothEnabledRequest {
     required bool enabled = 1;
 }