Abstract: "The development sukuk has been growing so fast for the last couple years since the first issuance in Malaysia in the early 1990s, known as Islamic Private Debt Securities (IPDS). However, in Indonesia, sukuk just issued in 2001 by PT Indosat Tbk, a telecommunication company based on mudharabah basis. Then, it followed by others which are dominantly in the form of ijarah (leasing) basis. But, the government Islamic bond or sukuk offered lately in 2008, this may be caused by unavailability of supporting regulations such as the difference of common and civil laws. This paper tries to identify some researches in sukuk. It identifies some approaches and methodologies in each research, such as qualitative and quantitative method, and then grouped into specific topics. However, researches are in qualitative and quantitative approaches in almost equal. Constraints found are due to lack of available data, existing unresolved discussions in conceptual background and unsystematic recording researches such as lack of refereed and regular journals."