Purpose The purpose of this study was to apply the Self-Assertiveness Training based on Solution-Focused to student-athletes caused by violence in sports. Methods Participants were five Taekwondo athletes in this study. They were consisted of offenders, a accuser, and a victim. The head coach of the team asked for counseling to resolve the conflict. Data was collected with quantitative, qualitative data, and group dynamics. The group counseling program was conducted for 90 minutes a week for eight weeks. Results The results are as follows. First, (application process) the 8-week Self-Assertiveness Training based on Solution-Focused was assessed to be applied step by step and systematically. Second, (qualitative evaluation) as a result of analyzing the observation journal and the interview data, the participants experienced the change of attitude and thought of group members in a short period of time by focusing on enhancing self-assertiveness. Third, (quantitative evaluation) self-assertiveness and attitude of school violence measured by questionnaires were higher in post-survey than pre-survey. In addition, participants' satisfaction with the program was found to be very positive. Discussions and Suggestions Self-Assertiveness Training based on Solution-Focused was found to have a significant effect on conflict resolution among the student-athletes who have experienced violence in sport. This programs was expected to increase the value of use in the sport field. Based on this case study, We suggested for future research.
