The purpose of this study is to explore and enhance measures to promote the sustainability of the effect of art therapy by exploring the factors that maintain and sustain the effect of art therapy after the con clusion of the art therapy program. After the art therapy program was completed, a study was conducted to explore the sustainability of art therapy after the end of the art therapy program by reviewing the opin ions of art therapists operating in the clinical field. To this end, 12 art therapists were interviewed non-face-to-face and analyzed using consensus qualitative research methodology. As a result of the analy sis, a total of 4 areas, 9 sub-areas, and 28 categories were derived. The research results are as follows. First, in terms of personal, relational, and therapeutic factors, there were client facilitating factors for sus taining the effect of art therapy, and client factors that hindered the continuation of the therapeutic effect in personal and environmental factors. Second, in terms of therapist and therapeutic factors, therapist fac tors that promote the continuation effect of art therapy, and therapist factors that hinder the continuation of the therapeutic effect in personal and environmental factors were derived. Based on the research results, the significance and limitations of this study were discussed, and suggestions for further research were made.