The purpose of this study is to review a group art activity program designed to improve school-aged children's sociability. For this purpose, Lowenfeld's therapeutic art education theory was examined. According to the theory, a therapeutic art education should be designed to motivate the children to be engaged in art activities spontaneously and thereby, improve their sense of self-identity, self-efficacy and self-respect, and thus, help both normal and abnormal children develop their whole personality. For this study, those elementary students who were treated by the infantilistic mental hospitals were sampled. In order to design the group art activity programs, the characteristics and problems of the abnormal children aged between 5 and 11 were analyzed. To be specific, the group art activity program for the children aged between 5 and 8 was focused on recognition and expression of emotion by means of pictures as well as acquisition of simple social languages, while the program for the children aged between 8 and 11 was focused on emotional stabilization through venting of emotion, art activities for enhancement of cooperation and competition, enhancement of sociability through observation/analysis/discussion of social activities. This study may be significant in that it has introduced the therapeutic aspects of art into the educational environment.