Purpose: The purpose of this study was to investigate the relationship between the ethical leadership with organizational citizenship behavior and the school principals’ performance (Case study: elementary schools in Tehran) in the academic year of 2017-2018. Methodology: The research method was applied in terms of purpose and descriptive-correlation in terms of the data collection. The population consisted of all 1353 elementary school principals in Tehran; 298 people (159 female principals and 139 male principals), were used as sample size using Morgan table and a stratified random sampling. The method of data collection was based on three questionnaires: Ethical Leadership Standard Questionnaire by De Hoogh & Den Hartog (2008), Organizational Citizenship Behavior Standard Questionnaire by Podsakoff et al. (1990), and Principals’ Performance Questionnaire by Patterson (1992; translated by Shekarshekan & Arsهادی, 2007). The reliability of this questionnaire was calculated more than 0.7 using Cronbach's alpha method for all dimensions of the questionnaire, which indicates the reliability of the research instrument. Content validity and construct validity were used to calculate the validity. The results indicated the validity of the research instrument. The data analysis was performed using SPSS-22 software in a significant level of 0.05 and in two descriptive and inferential parts (Pearson correlation coefficient test and single-variable and multiple-variable regression analysis). Findings: The results of data analysis showed that there was a positive and significant relationship between ethical leadership with the organizational citizenship behavior and principals’ performance; in other words, the principals’ performance increased with the increase of organizational citizenship behavior; also, the principals’ performance increased with the increase of ethical leadership. Conclusion: The predictive components of "fairness", "transparency of role" and "power sharing" have the potential to predict the organizational citizenship behavior and the principals’ performance.
