Background: Teachers are the most effective factor known in school and their job performance is one of the basic indicators of success and continuity of goals of educational organizations. The aim of this study is to investigate the effect of organizational culture and team work on job performance with emphasis on the mediating role of professional ethics among teachers. Method: This research is correlation using descriptive methods for applied goals. Structural equation modeling was used for data collection. The statistical population of the study included all teachers working in schools in the city of Galehdar with 600 people. The sample size was 234 according to the statistical population and using stratified random sampling method and Morgan table. Data were collected by the questionnaires of organizational culture (Denison), teamwork (Lanchioni), job performance (Patterson) and professional ethics (Gregory & Petty). Data were analyzed by Pearson correlation and structural equation modeling in SPSS 25 and LISREL 8.8 software. Results: There is a positive and significant relationship between the variables organizational culture and job performance (β=.40), teamwork and job performance (β=1.04), organizational culture and professional ethics (β=.41), teamwork and professional ethics (β=.33) and job performance and professional ethics (β=.64). At the same time, through the mediation of professional ethics, the variables of organizational culture and teamwork can anticipate job performance. Conclusion: This study showed that organizational culture, teamwork and professional ethics have an effective role on teachers 'job performance and in order to improve and improve teachers' job performance, these factors should also be considered. Article number: 28
