The purpose of this study was to understand family theraplay interaction to find out how family theraplay works to bring about change in adolescent with RAD and his parents. In exploring the meaning of theraplay interaction, I used a Phenomenology, which looked reflectively into a family experience. Examining the situation, I found that the adolescent had changed by touched with a therapist and his parents, which had been done throughout the whole process of family theraplay. Adolescent had changed from ‘those who did not respond’ to ‘those who has being responded’ and from ‘those who had been dependent’ to ‘those who has being independent.’ I realized four meaning: ‘going through symbiosis–coexistence–independent,’ ‘being mother and father,’ ‘putting oneself in a child’s place,’ ‘doing a mirror which shine two–way street.’ In addition, those four meaning could have made of interaction. For validity, data were collected through triangulation including in depth interview, participation observation, home activity diary, and parents diary.