The main purpose of this research was to study mediating role of psychological capital in the effect of authentic leadership on job satisfaction and life satisfaction. The study was correlational and statistical population included all employees of organization, out of which 112 employees were selected through convenience sampling method, in autumn 1396. The research instruments consisted of authentic leadership, Job Satisfaction, Life Satisfaction and Psychological Capital. The data were analyzed with use of structural equation modeling (SEM). Results revealed that, there were significant positive effect of authentic leadership on psychological capital, job satisfaction and life satisfaction. Moreover, there were significant positive effects of psychological capital on job satisfaction and life satisfaction. Furthermore, result of structural equation modeling showed that there was significant positive indirect effect of authentic leadership on job satisfaction and life satisfaction through psychological capital. According to the findings of this study, it can be concluded that authentic leadership directly affects psychological capital and through the effect on the psychological capital, increases job and life satisfaction
