The purpose of this research is to investigate the relationship between firm performance and CEO turnover with the moderating role of CEO's influence in companies listed on the Tehran Stock Exchange. In order to achieve this goal, 178 companies listed in Tehran Stock Exchange during the period from 2008 to 2016 were selected by systematic elimination sampling method and a total of 1602 firm-years were considered for analysis. In this regard, two hypotheses were developed and tested in the two models of return on assets and stock returns, as the representative of the firm's performance. Logistic regression was used to test the research hypotheses. The results of the research showed that both models indicate a negative and significant relationship between the firm performance and CEO turnover. Also, the results of the study about the effect of CEO influence on the relationship between firm performance and CEO turnover indicate that CEO's influence on the relationship between firm performance and CEO turnover does not have a significant effect