This study focus on family therapy for conflict and conflict resolution between mother and son who have separated and reunited for a long time. As soon as they started to live together, their relationship soon got worse. the son acted violently against his mother, and mother told her son to break up. This study was analyzed using qualitative case study methods. Through this case study, the researcher confirmed the factors that destroy attachment bonding, the intervention methods that help to restore the relationship, and the effects of family therapy. This study will provide good insight into changing family relationship with attachment ruptures.