The main purpose of this study is to show the relationship between organizational citizenship behavior and organizational justice perceptions of the employee’s. The researcher also aimed to find out if there were gender differences as a moderating variable. For this purpose, an empirical research was carried out on a total of 150 people working in various sectors in Istanbul by using SPSS 20. The data was analysed using Pearson’s Correlation, a linear regression analysis and a t-test. Also correlation and regression analysis were used to analyze the collected data. According to the Regression analysis results; it has been seen that there is only a meaningful correlative relationship between the distributive justice and the Civic Virtue. And also the four sub-dimensions of organizational citizenship (Civic Virtue, Altruism, Courtesy and Conscientiousness) have a correlative relationship with Procedural Justice. But there is no significant differences were found among males and females. This research showed that any procedures that direct to improved organizational justice perception and that improvement will enhance better organizational citizenship behavior.