The aim of present study was to investigate the mediator role of occupational self-efficacy in the relationship between professional development and job commitment and satisfaction among staff of sports and the youth department of east Azerbaijan province in 2016-2017. Methods: This descriptive correlation study is a structural equation model. The statistical population included 322 employees of Sports and the Youth Department of East Azerbaijan province. 203 of them were selected using stratified random sampling; which was used to determine the sample size from the Morgan table. For data collection, standard questionnaires were used. Data analysis was performed using descriptive indexes and structural equation modeling method. Results: Statistical analysis of the data indicated that there is a significant and positive relationship between professional development and job satisfaction and commitment (P<0/01, r=0/67, r=0/43). Moreover, the results of the study indicated that there is a significant and positive relationship between self-efficacy and job commitment and satisfaction (P<0/01, r=0/21, r=0/36). The highest level of significant correlation was obtained for the relationship between professional development and job satisfaction (r=0/67) and the lowest significant correlation was obtained for the relationship between professional development and self-efficacy (r=0/19). In addition, the results showed that the mediator role of job self-efficacy in the relationship between professional development and job satisfaction and commitment)β=0/05, β=0/06(was confirmed. Conclusion: According to the findings, it can be concluded that any increase in professional development is accompanied by an increase in satisfaction, job commitment and self-efficacy from the staff. In this regard, attention to professional development among the staff of sports and the youth department can be of great importance in increasing job satisfaction and commitment as well as promoting self-efficacy among employees.