The purpose of this study was to verify structural relationships among shame, professional self-efficacy, and self-encouragement. Using the SPSS 25.0 program, this study analyzed the statistical data collected from 200 music therapy experts and students. The results are as follows. First, shame of music therapy experts and students has negative effects on professional self-efficacy. Second, self-encouragement of music therapy experts and students mediates the relationship between shame and professional self-efficacy. Therefore, it has been found that the shame of music therapy experts and students has a causal effect on professional self-efficacy, and self-encouragement mediates the effect. The result shows factor that influences the professional self-efficacy of experts and students, and provides significant information on the therapist factor needed to improve their professional self-efficacy.