The purpose of this case study is to help a non-adaptive child adopting play therapy based on Adlerian theory. After collecting the information about the child and assessing his problem, a fifty minutes structural play therapy was used once a week. Moreover, the child's mother was visited and counseled by phone at the night before the therapy. After six sessions of play therapy for developing a sense of trust, safety, and well-being, this case was improved significantly. The child's improvement can be attributed to following mechanisms: (1)the establishment of a warm relationship to assist in raising a sense of responsibility; (2)the exploration of family constellation and family atmosphere to establish a positive self-concept; (3) the enhancement of self-awareness to improve interpersonal relationship.