Generally, the main objective of managers is improving organizational outcomes. Review the history of organization and management shows that to accomplish of this, were provided many different ways. One of the new ways is Psychological capital. Psycap is one of the new concepts in recent years, and it has entered in the field of management since new centuryPsychological capital is one of the new concepts in recent years that consider the capabilities and positive qualities in people and importance of a positive work environment; and try with the theoretical and practical approach and positive elements help to employees' life and work. Due to the developing the approach of psycap in the organizations, this paper has studied and identified the role of psycap on organizational commitment and job satisfaction in Iranian public organization. So, first the researcher reviewed the research literature, then with the use of descriptive-survey method, statistical sample of the population that were employees of public organizations in Tehran province were selected and the research hypothesis were tested by using structural equations and regressions. The finds of research shows that psycap has significant positive relation with the organizational commitment and job satisfaction. The result show resiliency has the highest rank, and optimism lowest rank. At last, psycap has the moderating role between organizational climate and organizational commitment and job satisfaction.