this article we had tried to define Organizational Citizenship Behavior and it's importance as well as review on the literature of Organizational Citizenship Behavior. History of Organizational Citizenship Behavior and its definition from different viewpoints of verious scientists, types of Organizational Citizenship Behavior with regard to the classifications and the factors which influence Organizational Citizenship Behavior is discussed In this Survey. In the other part of the article, the research methodology is described that encompases hypothesis, research methodology, the population and the sample are explained and with respect to the mentioned issues Research findings are analyzed through descriptive and inferential statistics; at the end, according to results of statistical test the conclusions are presented.
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