ABSTRACTProblems of an increasingly complex society require proper resolution. Islamic law that makes the Al-Qur'an and al-Hadith as the main reference there is a time does not explain Islamic law in detail, while Muslims must live their lives according to Islamic rules, norms and laws are required to always be relevant to the development of increasingly complex times. Ijtihad is needed in dealing with this problem, one of the products of ijtihad is t urf which can be used as a solution and as a source of Islamic law. The method used in this study is a descriptive qualitative analysis research method and includes a type of research that is literature study. Now ‘Urf is something that is known by many people and done by them, both from words...