In the regency of Kuantan Singingi, there is a district name Kuantan Hilir Seberang. This district has separed from district of Kuantan Hilir Baserah and now it becomes new district. In this district, there is “Bagito” tradition which still exists and practices by people. “Bagito” mean receiving someone from different areas to be their own relatives. The person is confessted to be sibling. By having “Bagito”, the number of family becomes wider. The method used in the research is descriptive by using qualitative approach. The technique used in the research is interview in reader to get real information about the data. The result of the research shown that “Bagito” tradition may strengthen (friendship) all members in a big family. This tradition also can show them where is their origin family and where is “Bagito”, but all of them unite in the family.