diff --git a/src/Reducer.js b/src/Reducer.js
index 510d72897..0c63e4f29 100644
--- a/src/Reducer.js
+++ b/src/Reducer.js
@@ -22,6 +22,7 @@ import {
 
 import { assert } from './Util';
 import { getInitialState } from './State';
+import { Platform } from 'react-native';
 
 // WARN: it is not working correct. rewrite it.
 function checkPropertiesEqual(action, lastAction) {
@@ -72,6 +73,11 @@ function inject(state, action, props, scenes) {
     case POP_ACTION2:
     case POP_ACTION: {
       assert(!state.tabs, 'pop() operation cannot be run on tab bar (tabs=true)');
+
+      if (Platform.OS === 'android') {
+        assert(state.index > 0, 'You are already in the root scene.');
+      }
+
       if (state.index === 0) {
         return state;
       }
diff --git a/src/Router.js b/src/Router.js
index 43ff28384..751d352c0 100644
--- a/src/Router.js
+++ b/src/Router.js
@@ -10,6 +10,7 @@ import React, {
   Component,
   PropTypes,
 } from 'react';
+import { BackAndroid } from 'react-native';
 import NavigationExperimental from 'react-native-experimental-navigation';
 
 import Actions from './Actions';
@@ -98,6 +99,15 @@ class Router extends Component {
   render() {
     if (!this.state.reducer) return null;
 
+    BackAndroid.addEventListener('hardwareBackPress', () => {
+      try {
+        Actions.pop();
+        return true;
+      } catch (err) {
+        return false;
+      }
+    });
+
     return (
       <NavigationRootContainer
         reducer={this.state.reducer}