The main purpose of this study is to investigate the effect of environmental transformational leadership on organizational citizenship behavior with the mediating role of perceived meaningful work of Tehran District 22 Municipality. The study population in this study is the employees of the municipal district of District 22 of Tehran. The number is about 400 people and the sample size was obtained according to Cochran’s 196 formula. The research method in the present study is applied in terms of purpose and descriptive in terms of implementation method. Kolmogorov-Smirnov test was used to test the normality of the data, which proved with 95% confidence that the variables had an abnormal distribution. Therefore, due to the abnormality of the data distribution, therefore, Pls software was used to analyze the data. The results showed that: environmental transformational leadership has an effect on organizational citizenship behaviors.
