Abstract: Objective: To explore the impact of mentoring of extramural advisor on job performance of practice in postgraduates of mental health education and the mediating role of teacher competency. Methods: The convenience sampling method was used. Mentoring of extramural advisor, job per-formance of practice and teacher competency in 74 postgraduates of mental health education were surveyed with the Extramural Advisor’s Mentoring Questionnaire (EAMQ), the Practice Performance Questionnaire of Postgraduates of Mental Health Education (PPQPMHE...