Environmental changes and increased global competition have led managers to pay attention to the issue of OCB of staffs, since organizations will be able to adapt themselves better with changes and compete in light of having committed, and motivated staffs. The objective of current research is investigating the impact of SL style on OCB of staffs working in Saderat Bank in Sistan Region. The research method is correlative considering nature and applied considering objective. Research population included all 91 Saderat Bank staffs in Sistan Region in 2017, which 91 of them were selected as sample of study using the census method, considering its limited size. The standard questionnaire of Bass and Avolio SL questionnaire (2003) was used to collect information to test the hypotheses, Podsakoff questionnaire (2000) was used to measure the variable of citizenship behavior. The professors and experts approved its content validity and reliability was obtained 0.789 and 0.834 for SL questionnaire, and empowerment questionnaire, respectively, using Cronbach's alpha. Descriptive and inferential tests (linear regression, stepwise, and single-sample T-test) were used with the help of SPSS software to analyze the data. Results of the study indicated that SL and its components have a significant relationship with OCB of the staffs working in Saderat Bank of Sistan.
