This case study is to intervene crisis family with a child who has a conduct disorder. The principles and techniques of art therapy were reviewed. IP is a girl who is 4th grade in elementary school. Her family are also invited in therapy session The therapy is consisted of 18 sessions. The focusing techniques are to express child's emotion through art activities and to facilitate interaction between family members and child. There are many positive changes of their relationships and less maladaptive behaviors. Thus, it suggested that famìly interventions through art therapy can be practically useful.