The aim of this article is to discover the definition and concept of istihsan according to al-Shatiby. It also highlights the objective of al-Shatiby’s renewal of Islamic law with istihsan as one of his methods. According to him, istihsan is the abandonment of legal ruling arrived at by conventional evidence and the adoption of an alternative ruling derived from inferior evidence. On the other word, it is putting forward specific welfare at the expense of qiyas or conventional evidence because harms will certainly be inflicted whenever qiyas or conventional evidence is observed. Meanwhile, renewal of Islamic law simply means a movement to exercise ijtihad to produce legal rulings capable of answering the problem posed by the modern scienc...