This study had a purpose to present a comprehensive grasp of the variables that influence a sense of self-identity in children of multi-cultural families. The participants were 310 elementary school children from the fourth to sixth grades and who were currently enrolled in North Jeolla Province. The results were as follows. First, no significant difference was found for a sense of self-identity according to the children`s gender. But a significant difference was found according to the nationality of the mothers. Second, the boys` self-identity was affected by mother`s rejection of discipline/reprimand behaviors and the girls` self-identity was affected by school satisfaction. Last, children`s self-identity was affected by the mother`s nationality(Japan, China, and Philippine).