Objectives In this study, self-esteem, school organizational culture, and Multicultural education awareness, which are variables affecting the multicultural teaching efficacy of secondary school teachers in Jeonbuk-do, were selected and specific indirect effects among them were analyzed.
 Methods For this purpose, a questionnaire was conducted to measure the variables of self-esteem, school organizational culture, multicultural education perception, and multicultural teaching efficacy targeting 526 teachers of 22 secondary schools located in Jeonbuk region. SPSS 27.0 and AMOS 27.0 were used to analyze the structural model and special indirect effects using the structural equation model and phantom variables.
 Results As a result of this study, first, the self-esteem of secondary school teachers showed a direct effect on school organizational culture and Multicultural education awareness, but there was no multicultural teaching efficacy. Second, self-esteem was effective in multicultural teaching efficacy through school organizational culture and multicultural education awareness, and complete mediation was shown in the relationship between self-esteem and multicultural teaching efficacy. Third, as a result of the analysis of specific indirect effects, the indirect effect value was .111 (p<.01) with self-esteem → multicultural education awareness → multicultural teaching efficacy, and the indirect effect value was .101 (p<.01). In addition, as a result of the analysis with self-esteem → school organizational culture → multicultural education awareness → multicultural teaching efficacy, the indirect effect value was .034 (p<.01).
 Conclusions As a result of this study, the self-esteem of secondary school teachers had a direct effect on multicultural teaching efficacy, but there was a mediating effect according to school organizational culture and Multicultural education awareness. Therefore, multicultural teaching efficacy can be improved according to efforts to improve the school organizational culture where secondary teachers work and recognize multicultural education.