diff --git a/free-programming-books-ja.md b/free-programming-books-ja.md
index c16d9e38a1905496b6bb854b449f4cf3b3389e6a..747b8079ef901fa5a749b8c38261c3546e21a182 100644
--- a/free-programming-books-ja.md
+++ b/free-programming-books-ja.md
@@ -293,6 +293,7 @@
 * [初めての iOS アプリケーション](https://developer.apple.com/jp/devcenter/ios/library/documentation/iPhone101.pdf) (PDF) - Apple Developer
 * [Cocoa Programming Tips 1001](http://hmdt.jp/tips/cocoa/index.html) - 木下誠
 * [Web API を利用する iOS アプリ作成](https://github.com/hatena/Hatena-Textbook/blob/master/ios-app-development-with-web-api.md) - はてな教科書
+* [RubyMotion Tutorial: Ruby で iOS アプリを作ろう](http://tutorial.rubymotion.jp/) - Clay Allsopp, RubyMotion JP(翻訳)
 
 
 ### Java