: Legal Policy of Islamic Banking in Indonesia. Legal policy is something that underlies basic policy of a regulation and a basic policy of enactment specific regulation in the national legal system order. Setting and enforceability of Islamic banking regulations in Indonesia on political law perspective is something that deserves to be understood. This study uses qualitative research with descriptive comparative as its thinking analysis. This study shows that the regulation of Islamic banking was a reflection of basic policy dimension. Islamic banking regulation was a response to growing Islamic banking industry that need of legaly and legal justice in a clear regulation. In the enactment of policy dimension, regulation of Islamic banking is believed to provide utility and benefit for Indonesia people and seen as a goal of national economic objectives. The existence of Islamic banking regulations in Indonesia nowadays reinforces the theory of Islamic law positivism and strengthening the legal prophetic paradigm in the national legal system