This study was to understand more abundantly about ego identity, social maturity, and in-depth experience of disabled adolescents who are conducted group art therapy. The participants were six disabled adolescents from special class in ‘K’ high school located in OO-Gu, Seoul. Group art therapy was conducted once every week for 120 minutes-long per session, 10 sessions in one semester, 20 session in total from April 14th 2010 to November 17th. Following tests have been done before and after group art therapy to find each effect; Test of Social maturity scale, Korean Adolescent Ego-identity Scale, K-HTP, KFD, and KSD. This study showed that each participant has change in their value for each test; For the ego identity test, Kim showed –9, +4 for Park, +3 for Kim, -5 for You, +2 for Lee. For the social maturity test, Kim showed +10.33, +3.81 for Park, +13.59 for Kim, +14.55 for You, +13.61 for Lee. The results from K-HTP, KFD, KSD were also considers to be meaningful. This study concluded that Group art therapy program have meaning of art therapy for disabled adolescents in the social welfare clinical practice field, the program was meaningful in the field of social welfare in a way that helped disabled adolescents from the field and that it suggested brand new view point to draw a policy and practice.