The purpose of this research is to find out why sesuku and bagito marriages occur in the malay community petalangan, to find out whether there has been a shift custom og marriage to the malay community petalangan, and to find out how mamak ninik’s role is about sesuku and bagito marriages occur. Petalangan Malay suku located in the area Pelalawan Regency, the Petalangan suku adheres to the sy…