Abstract: This study examines the relationship between affective-social competencies, satisfaction from quality of work and organizational citizenship behavior of Iranian nurses as a structural equation model. The population included all Iranian nurses in the public and private hospitals. By random cluster sampling method 152 nurses were selected. The instruments included affective-social competencies scale, quality of researching life scale and organizational citizenship behavior scale. The results of statistical evaluations in exploration showed that: There was a significant and positive relationship between nurses affective-social competencies and their organizational citizenship behavior. There was a significant and positive relationship between nurses affective-social competencies and their satisfaction from quality of work. Nurses affective-social competencies via their satisfaction from quality of work has a significant and positive relationship with their organizational citizenship behavior.