The purpose of this study was to verify the effect of a collective art therapy program on the psychological well-being of child care teachers. The research targets consisted of 24 child care teachers at daycare centers in Busan, with 12 test groups and 12 control groups. A total of 12 sessions were conducted twice a week, 80 minutes per session. psychological well-being measures were used as research tools. For data analysis, mixed analysis method was applied. Quantitative analysis was performed using t-test and program effectiveness analysis. The qualitative analysis was analyzed through the open coding method proposed by Strauss and Corbin (1998) to understand the meaning and structure of the collective art therapy program experience of the experimental group. As the group members experienced catharsis while performing art activities in the group as a community and gained an understanding of themselves through their artworks, they got to accept their own thoughts and emotions, and were able to form positive self-identity and adopt an active attitude toward life. They also formed positive interpersonal relationship through the support of group members and gained the ability to efficiently cope with or overcome a given situation.