The purpose of this study was to investigate the effects on the art appreciation group art therapy program for enhancing the mindfulness skills of pre - art therapists. preliminary art therapists in the city of “B” were assigned to an experimental group, comparison group, and control group, each comprising of 10 persons. The final program was carried out in 12 total sessions, with therapy once a week for three weeks, allowing for four sessions for each group, from September 13 to 30, 2015 in order to validate the effectiveness of this program. To verify the effectiveness, the Kentucky Inventory for Mindfulness Skill(K-KIMS) was used. For data analysis, repeated measures ANOVA was conducted in order to determine inter-group difference. We validated the effect of the program on the mindfulness skill, and the results showed that the group art therapy program involving famous painting appreciation was effective in promoting mindfulness skill of preliminary art therapists. As shown above, the group art therapy program involving famous painting appreciation was found to have a positive effect on the mindfulness skill of preliminary art therapists. This study is significant, considering that it investigated mindfulness skill for preliminary art therapists amidst a lack of related studies. However, it is important for promoting mindfulness skill from the standpoint of the development of preliminary art therapists qualifications.