The purpose of this study is to examine the structural relationship between the counselor's professional identity, self-efficacy, the counselor's level of development, and burnout. To this end, a questionnaire consisting of the counselor's professional identity scale, self-efficacy scale, counselor development level scale, and burnout scale was conducted for 356 counselors working as counselors across the country. 356 responses were used for analysis. In order to confirm the structural relationship of the variables, a research model and a comparative model were established, and the final model was selected through the verification of the fit of the model. As a result of the study, first, there was a positive correlation between professional identity, self-efficacy, and the level of the counselor's development, and a negative correlation with burnout. Second, professional identity had a direct impact on self-efficacy, and had a direct/indirect effect on the level of development and burnout of counselors. Third, self-efficacy had a direct effect on the level of development of the counselor, and had a direct and indirect effect on burnout. Fourth, in the relationship between professional identity and burnout, it was confirmed that self-efficacy and the level of the counselor's development had a sequential partial mediating effect. Based on these results, the significance of this study and suggestions for follow-up studies were discussed.