This study examined the effects of transactional leadership, transformational leadership, and leader feedback on job satisfaction through the mediating effects of reward fairness and organizational citizenship behavior. Using structural equation modeling, the study discussed factors that positively influence leader feedback, along with the differing effects of transactional and transformational leadership. The results of analyzing the Public Service Life Survey indicated that while transactional leadership positively affected reward fairness, it did not significantly impact organization citizenship behavior. On the other hand, transformational leadership positively affected organizational citizenship behavior, it did not significantly impact reward fairness. Transactional leadership negatively affected job satisfaction, whereas transformational leadership had a positive impact. Leader feedback significantly enhanced the mediating variables and job satisfaction. This study analyzed the differences in the influence of leadership, and provided the direction of more appropriate human resource management policy. This study provided selection method of leadership for strengthening organization citizenship behavior and reward fairness.