This study aims to analyze the influence of psychological capital on organizational performance and to verify the moderating effect of emotional intelligence and the mediating effect of positive mood. The results of an analysis are as follows: First, the influence of psychological capital is higher in job satisfaction than in OCB. Second, the moderating effect of emotional intelligence is recognized in psychological capital and organizational performance. In particular, job satisfaction shows a higher moderating effect than OCB does. Third, no direct effect of psychological capital on OCB is recognized while an indirect effect of psychological capital on OCB through positive mood is recognized. Thus, it is judged that the results of this study would be effectively utilized as a means of motivation for growing individuals and achieving organizations’goals by emphasizing the importance of psychological capital and psychology and systematically managing psychological phenomena according to individual differences.