Abstract
In this study, through group play therapy of subject A, who was depressed due to negative experiences in interpersonal relationships, we examined the significance of play therapy for adults diagnosed with autism spectrum disorder （ASD）, focusing on how to experience. A showed unidirectional communication and had difficulty focusing on his positive aspects. However, mutual communication gradually increased through a program that encourages mutual interaction with others and a therapist’s involvement. Furthermore, through the experience of sharing emotions, A began to focus on the positive aspects of himself. Thus, the program and the therapist’s involvement, in this case, brought about a change in how A experienced interpersonal relationships and enhanced his self-esteem. This was possible when A allowed himself to experience successful communication through spontaneous responses in activities that he could enjoy without difficulties.
