The problem in this study is related to the tradition of manyangar heritage of the Hindu Kaharingan religion which is still maintained by the Bakumpai Dayak community even though they are already Muslim. The purpose of this study is to explore how the implementation of the manyangar tradition, explore the reasons for the community to carry out the tradition and analyze the content of Islamic values in the manyanggar tradition. This research is empirical legal research using a descriptive qualitative approach. The findings in this study are that there are two versions of the implementation of this tradition, firstly, the regency of South Barito and Murung Raya, still carry out manyanggar as in the past, using offerings and there are handlers who communicate with Jinn and Gods. Second, in the North Barito regency, manyangar activities have changed, namely by reading á¹£alawat burdah around the village and no longer using offerings such as 40 kinds of cakes, buffalo heads, goat heads, chickens, and others. The reasons why people carry out the tradition of manyanggar include, firstly, people still believe in animist beliefs. Second, the community implements customary law that has been passed from generation to generation. As for those related to Islamic values in community-building activities, namely the spirit of cooperation, they work together in carrying out workshops, such as cooperation in making stages, making ancak, making cakes, making food ingredients, and others. The value of alms, in the event of dancing, requires a lot of funds and food ingredients. The funds and food ingredients are donated or donated by community members.