The purpose of this research is to analyze the clothing behavior according to the sexual difference, coeducational system, and three groups divided with the score of psychopathic deviate and masculinity-femininity. Data were collected with questionnaires. Samples were 699 boys and girls of middle school in Incheon area. The major findings can be summarized as follows: The variables of fashion-orientation, attention getting, satisfaction of cloth and modesty are significantly different from boys and girls, but conformity is not significant. The variables of attention getting, conformity, satisfaction of cloth and modesty are of significant difference among three groups divided with the score of psychopathic deviate. The variables of satisfaction of cloth, modesty, and fashion-orientation are significantly different among three groups according to the masculinity-femininity.