diff --git a/binding-mri/graphics-binding.cpp b/binding-mri/graphics-binding.cpp
index 87cb89c..bcb44b6 100644
--- a/binding-mri/graphics-binding.cpp
+++ b/binding-mri/graphics-binding.cpp
@@ -209,6 +209,15 @@ RB_METHOD(graphicsResizeWindow)
 	return Qnil;
 }
 
+RB_METHOD(graphicsMaximizeWindow)
+{
+	RB_UNUSED_PARAM;
+
+	shState->eThread().requestWindowMaximize();
+
+	return Qnil;
+}
+
 DEF_GRA_PROP_I(FrameRate)
 DEF_GRA_PROP_I(FrameCount)
 DEF_GRA_PROP_I(Brightness)
@@ -268,4 +277,5 @@ void graphicsBindingInit()
 	INIT_GRA_PROP_BIND( ShowCursor, "show_cursor" );
 
 	_rb_define_module_function(module, "resize_window", graphicsResizeWindow);
+	_rb_define_module_function(module, "maximize_window", graphicsMaximizeWindow);
 }
diff --git a/src/eventthread.cpp b/src/eventthread.cpp
index 9bb59b2..8be64df 100644
--- a/src/eventthread.cpp
+++ b/src/eventthread.cpp
@@ -80,6 +80,7 @@ enum
 {
 	REQUEST_SETFULLSCREEN = 0,
 	REQUEST_WINRESIZE,
+	REQUEST_WINMAXIMIZE,
 	REQUEST_MESSAGEBOX,
 	REQUEST_SETCURSORVISIBLE,
 
@@ -459,6 +460,10 @@ void EventThread::process(RGSSThreadData &rtData)
 				updateCursorState(cursorInWindow, gameScreen);
 				break;
 
+			case REQUEST_WINMAXIMIZE :
+				SDL_MaximizeWindow(win);
+				break;
+
 			case UPDATE_FPS :
 				if (rtData.config.printFPS)
 					Debug() << "FPS:" << event.user.code;
@@ -622,6 +627,13 @@ void EventThread::requestWindowResize(int width, int height, bool recenter)
 	SDL_PushEvent(&event);
 }
 
+void EventThread::requestWindowMaximize()
+{
+	SDL_Event event;
+	event.type = usrIdStart + REQUEST_WINMAXIMIZE;
+	SDL_PushEvent(&event);
+}
+
 void EventThread::requestShowCursor(bool mode)
 {
 	SDL_Event event;
diff --git a/src/eventthread.h b/src/eventthread.h
index 2ad7ec6..2352f79 100644
--- a/src/eventthread.h
+++ b/src/eventthread.h
@@ -89,6 +89,7 @@ public:
 	/* Called from RGSS thread */
 	void requestFullscreenMode(bool mode);
 	void requestWindowResize(int width, int height, bool recenter = false);
+	void requestWindowMaximize();
 	void requestShowCursor(bool mode);
 
 	void requestTerminate();