The purpose of this study was to investigate the effects of art therapy for youth at-risk. For this purpose, a meta-analysis of art therapy studies was conducted. Among articles and dissertations published in Korea, 27 data sets in 16 studies that met the inclusion criteria were reviewed and synthesized. The R software was used for the meta analysis. The results of this study are as follows. First, average effect size that synthesized 27 effect size deducted 16 dissertations that selected analysis object was statistically meaningful. Second, the result of compare and analyze clay, mandara, collage effect size for each group according to program type, collage was most effective, clay was a bit high effective, mandara was not statistically meaningful. Third, the result of conducting the meta ANOVA was statistically significantly different among clay, collage, mandara. Fourth, the result of analysis of publication error was not statistically meaningful. We offered implications and limitations of this study as well as considerable recommendations of art therapy for youth at-risk.