Purpose The purpose of this study was to further understand how out-of-school adolescents’ self-esteem and interpersonal relations have changed in a peer mentoring basketball program and what they have experienced for the program It was action research of qualitative research method. Methods 4 out-of-school adolescents in the adolescents Center of C-si were selected as the participant. The data was collected by in-depth interviews, participant observation, and research journal. The collected data was then analyzed by an inductive categorical system. Results The findings were summarized as follows: the out-of-school adolescents showed somewhat low self-esteem and difficulties of interpersonal relations at an early stage participating in the peer mentoring basketball program. However, their self-esteem and interpersonal relations have been gradually changed during the program. First, they participated in various mentoring activities and self-expression activities. Their self-esteem has been improved as they found their real values, communicated with others, and lived with their confidence. Second, they overcame personal relations with fear and indifference of others, extended personal relations, and sympathized with others to solve the problem that they had as interpersonal relations. Conclusions The out-of-school adolescents has positively changed their self-esteem and interpersonal relations through the peer mentoring basketball program. We expect that out-of-school adolescents could overcome their difficulty and live well their life in the future.
