According to Ibrahim Hosen, the flexibility, elasticity and dynamism of Islamic law (syari'ah) makes itself compatible for all conditions and situations and applicable throughout the ages. The element of dynamism and flexibility would appear to be more prominent in Islamic law category. Not only because of the role of ijtihad in it, but also, in terms of its application fiqh should follow the conditions and situations as well as the times. This studyshows that though his book, Islamic Law Reform in Indonesia, Ibrahim Hosen offers new principles of ijtihad. All of Ibrahim Hosen’s thought related to the issue of construction, way of thinking,academic arguments, articulation and rules of ijtihad and its implications in responding and anticipat...