This study focuses on the causes of changes in the customary marriage of Balinese transmigrants in Morini Mulya Village, Landono District, Konawe Selatan Regency. It uses a theory of cultural acculturation. This study uses ethnographic methods. The data collection techniques are observation and in-depth interviews. The results show that there is a change in the customary marriage to the Balinese transmigrant community in Morini Mulya Village. Some aspects of this change include: (1) changes in the order of customary marriage processions, which appear to have been different from the processions carried out by the people in Bali (their place of origin); (2) changes in equipment and food used in the marriage procession; (3) the occurrence of marriage between different castes and different religions. The three main things that cause this change are (1) because they are in a transmigration area that is much different from the conditions in the area of origin; (2) because of the weak customs that can be maintained by transmigrant communities, and (3) economic factors. Keywords: customary, marriage, changes, transmigrants.
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