The purpose of this study is to analyze the effects with quality, practicing a group art therapy to the children of high aggression. As a method of counseling, art therapy theory, children and group art therapy, and contents of aggression to children are explored. On basis of these major concepts, we have consisted of group art therapy program structured by 16 sessions to regard aggression to be reduced, and adapted it to the children being highly aggressive. According to the process going, the characteristics of aggressive behaviors of high aggressive children are gradually reduced and the positive changes are showed as symbols from the group art therapy works in general. Key words : Group Art Therapy, Aggression