Corruption is a global issue which is as old as governments and human beings. No nation or society can claim to be equipped with perfect and flawless managerial and social systems. So, in order to manage corruption, managers of organizations pay much due attention to causes and cures of corruption issue. The purpose of this study is to study the effect of organizational citizenship behavior on reduction of office workers corruption. To this end, in 2010, the head offices in West Azerbaijan province, including fifty-seven head offices were chosen as the target population of the present study. The target population included 250 participants (M.Sc. / MA and PhD holders). Data collection method employed was group random sampling. Statistical sample group included 152 participants from whom 147 questionnaires were handed back. Data analysis was performed on those 147 questionnaires. The result of the study pointed to the fact that organizational citizenship behavior produced an effect on the reduction of corruption in head office staff.