This study investigates the effects of a group art therapy to enhance a self-expression for the aged who has a stroke. The subjects include seven senior citizens who are participating a day care service program in the 00 Welfare Service Center for the Elderly. They were diagnosed with stroke aged over 65, showed depression and helplessness, had a low degree of communication with others, and experienced isolation. The group art therapy program was administered for 70 minutes twice a week over 17 sessions in total. To explore the change of self-expression, their artistic works and verbal responses were compared and analyzed in the early and later period using the evaluation tools of artistic and verbal self-expression. Their depression and behavioral changes according to the improved self-expression were examined by comparing SGDS on which a pre-test and post-test, their facial expressions, behavior, intimacy, and operational attitudes in the early and later period. And changes happened in each session were examined by a qualitative analysis. As a result, the group art therapy program was turned out its effectiveness to improve the artistic and verbal self-expression for the old-aged stroke survivors. The results showed that their self-expression enhanced, their depression level decreased and their adaptive behavior improved through the program. Therefore, a group art therapy program seems to be useful to increase a mental health and a quality of life for the old-aged stroke survivors who are suffering from psychological and social maladjustment.