This research is motivated by a change in the procedure of Batak Simalungun traditional marriage in Nagori Serbelawan, Dolok Batu Nanggar District, Simalungun Regency, North Sumatra Province. The formulation of the problem is (1) What aspects have changed in the Simalungun Batak customary marriage procedures in Dolok Batu Nanggar District, Simalungun Regency, North Sumatra Province. (2) What fa…