Background: Several researches demonstrate administrative corruption in public organizations. Ethically, fighting with kinds of corruption and especially administrative corruption is an inevitable necessity. The purpose of this research is examining the relationship between religiousness and administrative corruption with the mediating role of organizational commitment.
Method: Methodology is descriptive and correlative. Statistical population includes all employees of governmental offices in Sirjan city that 274 persons of them was selected as a sample. We have three standard questionnaires. Reliability confirmed by Cronbach coefficient and CR index. For validity also we used CFA. Data were analyzed by using structural equationin Liserel.
Results: Findings showed that religiousness has a significant relationship with administrative corruption through organizational commitment as a mediator. Also, religiousness directly has a significant relationship with organizational commitment and organizational commitment has a significant relationship with administrative corruption in public organizations.
Conclusion: Promoting religiousness can reduce administrative corruption. This influencing occurs directly and indirectly through relationship with organizational commitment. The result confirm an important role of obligation to ethics and ethical principles on reducing administrative corruption.