Many researchers have recently argued that adolescents in Japan tend to avoid deep relationships with their friends. The present study classified the adolescent's friendships into three types (surface, close, and defensive friendship) and examined the relation of the types with self-acceptance and social skills. Undergraduates completed a questionnaire, and the data for those who indicated that they had close friends were analyzed (210 males, 177 females). It was revealed that males of surface and defensive friendships had lower self-acceptance and those males of surface friendship felt satisfied with friends and didn't necessarily have less social skills than males of defensive friendship. Although there was no significant difference as to social skills among female groups, females of surface friendship had lower acceptance for their sociality and did not have a good relation with close friend. Moreover, the relation between conformity and social skills differed depending on the sex.