The purpose of research was to study the effect of psychological well-being on the athletic performance of professional athletes. The present research was a descriptive of causal-comparative type. The statistical population consisted of professional skill level with an experience of 10 years (n=100) were randomly selected. Data collection tools consisted of three questionnaires: Charbonneau exercise performance questionnaire (2001), Reif's psychological well-being questionnaire (1989). To test the hypotheses, multiple regression analysis was used. The findings showed that sporting performance of professional athletes with predictive psychological well-being is predictable. The effect of psychological well-being on the performance of athletes' professional sport is not significant. Keywords: Psychological well-being, Professional athletes