The purpose of this study was to practice an art therapy with children who maladjusted at school and investigate its effect on their emotional intelligence and peer relationship improvement. The research subjects were children who maladjusted at school and first graders in an elementary school located in K City. The program was conducted for 50 minutes, once a week for 25 total sessions from March to November 2016. The Emotional Intelligence Test for Low Graders in Elementary School standardized by Moon Yong-rin(1999) and the Peer Relationship Test in which Park In-suk(2008) translated the Network of Relationships Inventory(NRI) were carried out as pre-test, post-test, and follow-up test for comparative analysis. Moreover, Kinetic School Drawing(KSD) was used as pre-test, post-test, and follow-up tests for projective tests to compare and analyze. The research findings were as follows. First, the score in the sub-area in the Emotional Intelligence Test generally increased, resulting in positive change. Second, the scores in sub-area in the Peer Relationship Test generally increased, and the research subjects refused to express person in the KSD pre-test. However, they expressed play situations with friends in the post-test, which indicated that interaction with peers increased, resulting in positive change as well.