The purpose of this study is to find out how Korean adolescents make decision in the situation of conflict at home. The results of this study are summarized as follows; First, the most conspicious conflict that adolescents experience at home was in the order of the classwork and the course. Second, the decision-making style of adolescents in the situation of adolescents in the situation of conflicts which adolescents should make decision was in the order of the dependent style, the intuitive style, the rational style, the helpless style, and the delay style. Third, in the decision-making style, there was meaningful difference according to sex. The dependent style was high in the case of schoolboys and the rational style was high in the case of schoolgirls. Fourth, in the decision-making style, there was meaningful difference according to educational system. The dependent style was high in the case of middle school students and the rational style was high in the case of high school students. Fifth, there was non-meaningful difference according to parents` vocation and birth order in the decision-making style