摘要:AbstractThe aim of this study was to investigate the relationship between organizational justice and organizational citizenship behavior. The population consisted of all staff of Islamic Azad University, Tehran Science & Research Branch. To collect data, Podsakoff &Net.mier's (1990) questionnaire of OCB and Beugre's (1998) questionnaire of organizational justice were used. To determine its reliability, Cronbach-alpha was used (OCB questionnaire 0.85 and organizational trust questionnaire 0.87). The collected data was analyzed using descriptive statistics indices and inferential statistics after collecting. The results showed that mean of OCB are slightly more than average. And there is significant positive relationship between the components of organizational justice (distributive, procedural, and interactional justices as predicative variables) and OCB.