The current research aimed at investigating the effect of organizational commitment on the employees` performance with the mediating role of organizational happiness. The statistical population included employees working in the ministry of education of Ardabil. Due to the boundaries of the sample, census method was utilized. Data were collected among 280 employees. The data has been collected through sending the questionnaires, whose questions were extracted from Allen and Meyer’s Three-Component Organizational Commitment Scale, Chen, et al.`s questionnaire of organizational commitment performance and the Oxford Happiness Questionnaire (OHQ). In order to analyze the data, the SEM technique and LISREL software were used. The research results showed that there was a significant correlation between organizational commitment and employee performance, and organizational happiness also affected employees` performance. Moreover, the positive effect of organizational commitment on organizational happiness was confirmed in relation to the correlation between organizational commitment and organizational happiness. In addition, the relative mediator role of organizational happiness regarding the relation between organizational commitment and employees performance was confirmed.
