Abstract: Sociologically, the existence of Islamic banks in Indonesia had developed since the early 1990 through a long time of workshops and bureaucratic processes until Bank Muamalat Indonesia was established as the first Islamic bank in Indonesia. The existence of Bank Muamalat Indonesia, as the first Islamic bank, has a mission to present an Islamic banking institution that is free from the interest system by replacing its operational system through Islamic principles. Normatively, the profit sharing concept used to an operational system for Islamic banks in Indonesia which has been regulated in Article 1 Number 12 of the Law of Banking Number 7 of 1992, then the dual banking system in Article 9 of the Law of Banking Number 10 of 1998, ...