Present study investigates the effect of workplace spirituality on customer–oriented organizational citizenship behavior by considering the role of spiritual intelligence. To measure the concepts of workplace spirituality, customer–oriented organizational citizenship behavior (CO-OCB) and spiritual intelligence, the conceptualizations are applied on 282 employees of an insurance company in Tehran during the fiscal year of 2011 and the results are analyzed using structural equation modeling. The findings reveal that spiritual intelligence and workplace spirituality have positive impact on customer–oriented organizational citizenship behavior. However, when spiritual intelligence is considered as a moderating factor, spirituality development in workplace cannot alone influence on customer–oriented organizational citizenship behavior since including spiritual intelligence hedges the effect of workplace spirituality on customer–oriented organizational citizenship behavior though workplace spirituality can improve customer–oriented organizational citizenship behavior through impacting on spiritual intelligence.