Islamic Banking is generally focused on the spiritual market, namely the Muslim group. Muslim community as if reluctant to become customers of conventional nature of the business to justify interest (usury system). Though ethnic markets Tioghoa must be considered because it has great economic potential, as well as a significant amount. This study discusses the factors that influence ethical tionghoa become customers of Islamic banks, namely to see what is becoming the dominant factor. To address this problem used multiple regression analysis techniques that give a descriptive overview of the analysis of the data processing. This research resulted in the answers to the above issues. The factors that affect the promotion, price, product, location and service.