Baitul maal wattamwil (BMT) is a microfinance institution that uses the approach of Islamic patterns. The existence of BMT MMU in the midst of Muslim society / the students and the PondokPesantren Sidogiri is such an empowerment model of small and medium businesses which has been running since 17 July 1997. BMT MMU Sidogiri stands and operates based on the spirit of dedication and sense of community is concerned about the economic existence around the boarding school are entwined by the practice of money lenders, who became the attention and concern of the owner Boarding Schools and finally stood MMU SidogiriBMT. From this background emerged a few questions What is the role of Baitul Maal wattamwil (BMT) Sidogiri At boarding school in empowering small and medium enterprises (SMEs)?. the purpose of this study was to determine and analyze the role of Baitul Maalwattamwil (BMT) At boarding school in empowering business Sidogiri small-medium enterprises (MSMEs). BMT-MMU Sidogiri role in enhancing the empowerment of small and medium business is a real happening, and is one of the microfinance institution with a proper system of sharia to be made in alternative models to be developed in increasing empowerment of small and medium enterprises in the future. This can be seen from some indications that the number of member development, asset and his work, microfinance institutions such as BMT MMU Sidogiri.