High school teachers play an important role due to the specific age range of students. The present study was conducted to determine the effect of professional development and job values on job performance of Babol high school teachers. This study is applied in terms of objective. In this study, quantitative approach, survey strategy, descriptive method, correlation, multiple linear regression and path analysis were used. The statistical population of the research consists of 1438 Babol high school teachers who were working in the academic year of 2022-2023. Using Cochran's formula, 364 teachers were selected as a sample by simple random method. The data collection tools are three questionnaires of professional development, job values and job performance. The data was analyzed by Pearson correlation coefficient and multiple linear regression by SPSS 25 and path analysis model by AMOS 22. The results showed that professional development had a significant effect on job performance both directly and indirectly through job values as a mediating variable and can predict it. It is suggested that the education officials use scientific and practical methods to provide the conditions for the professional development of teachers in order to promote their job values and improve their job performance
