As a part of study examining Korean costume remaining in Yanbian China, this study explored changes in ceremonial clothing for marriage worn by Korean(Chosun race) in Yanbian China. About one hundred years ago, Koreans moved to Yanbian China and had worn traditional clothing for marriage ceremony until before 1940. Data were collected by true interview and field observation while staying in that area. Samo and Dalyung for bridegrooms, Wonsam and Jockdoory for bridegrooms, wonsam and Jockdoory for brides were usual costume for wedding ceremony, however, for couples in inferior conditions of life, Bazy and Jeogory for bridegrooms, yellow Jeogory and red Chima for brides were accepted for ceremonial costume. As western culture came to this area in about 1940, bridegrooms wore western style suit, while brides dress in white Chima, Jeogory and Neowool. To date, Korean brides have worn traditional Chima and Jeogory for marriage ceremony though slight change has occurred in clothing material and in the forms of Chima, Geogory and Neowool. As the pratice reflected the fact that Korean in Yanbian China as established and sustained traditional China as established and sustained traditional costume and Korean identity even in hush socio-cultural environment.