Abtract: Essencial Rejection Shafi’i istihsân and its Relevance Against Islamic Family Law Reform. Rejection and cancellation Shafi against istihsân as a proposition of law in totality, both at the level of theoretical concepts-normative and applicative-implementable on legal cases. Hanafi fiqh scholars accusations against Shafi’i on a number of practice ijtihad, it was not proven true, and not one single subject matter Shafi’i establish legal provisions based istihsân problem. If rejection Shafi’i against istihsân associated with ideas and movements of Islamic family law reform in this modern era, seems to have loosened even relevanced with time and age condition that the substance of the reform movement can be realized. Had istihsân not b...