This article discusses the institutionalization of Islamic law into national law in Indonesia. The aim is to analyze the possibility of incorporating Islamic Law into the national legal system. This desire is logical, considering that Muslims in Indonesia occupies the majority position (85%) and the community requires appropriate regulations sourced from the teachings of their religion. Based on the results of the 1979/80 BPHN legal review seminar, there are at least 3 (three) main things that could be done, namely; (1) making Islamic law one of the ingredients in the preparation of national law, (2) reviewing and updating national legal products originating from colonial law that is not following the elements of Islamic law. (3) coordinati...