In this article, the author presents the result of his case study on a customary institution in Nanggalo, a subdistrct in the Municipality of Padang, West Sumatra. The focus of this study is on the role of a Minangkabau customary institution known as Karapatan Adat Nagari [KAN] in fostering the values of tolerance which are necessary for a multiethnic life in Nanggalo. The author found among, o…