AbstractThis paper aims to reveal the acculturation of Islam with the customary endorsement of the marriage of the Sakai tribe community in the Bathin Solapan region in Bengkalis Regency, Riau. As a native tribe, Sakai has a strong belief in his culture, especially marriage by using various social symbols with Bathin as the main character who becomes the legitimate determinant of a marriage. Likewise the shrill of a dog in Bathin's house is a benchmark for the validity of a marriage. Because this study is a study of social and cultural heritage that integrates with Islam, the methodology used in accordance with the concept of social science research is a qualitative descriptive method that focuses on content analysis with several stages of ...