This study examines the effects of the trait-anxiety of music therapy experts and interns on
countertransference management ability; further, it analyzes the mediating effects of professional
Self-efficacy on this ability. By using the SPSS 22.0 program, this study analyzed data collected
from 117 music therapy experts and interns. The research results of the hypotheses revealed the
following aspects: First, the trait-anxiety of music therapy experts and interns has negative
effects on countertransference management ability. Second, the professional Self-efficacy of
music therapy experts and interns mediates the relationship between trait-anxiety and
countertransference management ability. This study’s results are significant as they provide the
basic data required for identifying the factors influencing the countertransference management
ability of music therapists and for effectively managing the countertransference occurring in a
clinical situation.