The improvement of IT in this time is very quick. The most important point is Smartphone with platform android and it’s applications inside. Talking about android application, the application of the Android Smartphone is also numerous items. The application starts from games applications, educational applications, business applications, and musical applications. Treat the problem of music application, there are a lot of musical applications that have been developed by the developers, but for the musical application, especially traditional music application is still rare to be found like Balaganjur Balinese traditional Gamelan has never been launched by the developers. Because of that appears an idea to improve an application of traditional music which is bundle between Gamelan Balaganjur with Android. This application is build using software Eclipse Indigo and for the system of design is build using software StarUML. Regarding to the development of Gamelan Balaganjur application is expected to make it easier to play its instrument. Besides, the art devotees and who are willing to Gamelan Balaganjur can easily learn Gamelan Balaganjur without having the real instruments.