Minangkabau, is one of the largest ethnic groups in Indonesia that has uniqueness in the context of a multicultural society. In this ethnic, there is a tradition that unites immigrants and indigenous tribes by entering migrants into one of the existing tribes, called Malakok. The life of the immigrant community with the natives through Malakok runs in harmony. In the other hand, multicultural values have been built such as mutual respect between different ethnicities and religions, equality and brotherhood among others in everyday life. This study aims to analyze these multicultural values and the factors behind the formation of these values. The research was conducted using a phenomenological approach. Data were collected using observation techniques, in-depth interviews and Focus Group Discussions at the research site. The results of the study show that the people of the two tribes live in brotherhood, respect each other, are fair to each other, and each tribe still maintains its identity.