The aim of this study is to investigate the effect of internal marketing on physical education and sports teachers' job performance. Data were obtained from physical education and sports teachers (N=157) working in public institutions in Turkey. The data were collected with two scales measuring internal marketing and job performance. Descriptive analysis, validity and reliability analysis, correlation, and hierarchical regression analysis were applied to the obtained data. Validity and reliability analysis showed that both scales are highly valid and reliable. As a result of the hierarchical regression analysis, it was seen that internal marketing had a significant and positive effect on physical education and sports teachers' job performance. In order for education managers to achieve high performance in their organizations, they are suggested to apply internal marketing effectively.