Leadership of Head Madrasah In Implementation Management Based of in MTsN LawangMandahiling. As a result of this research include: The leadership style of the head master of school isstyle democracy. The high school governmental organizations Lawang Mandahiling implement school- based management as well. The supporting factors in the application of school - based managementwhich are as follows: Many support and participation of the community and parents of pupils andthe local government. To this school vision, mission that clear . The headmaster had a democraticleadership school committee has its job well. If appropriate school and harmonious interaction betweenentering and leaving. Factors obstacles in the application of school - based management which are asfollows: There are some parents of poor students . Knows some materials that teachers vary scientificqualifications . Few facilities supporting the education process with that there is the work of the schooland the community and parents of pupils and the local government.Kata Kunci: kepemimpinan, manajemen berbasis sekolah