Investigating the impact of intellectual capital on organizational performance: A case study in an Iranian medical science university

New economic growth comes from information and knowledge. This situation increases importance of intellectual capital as an economic and research item. The role of intellectual capital in improvement of performance and social and technological economy is the subject of new researches in knowledge organizations. Intellectual capital is known as the main source of competitive advantage and value creation in today’s organizations. In this research, at the first stage, intellectual capital and its elements studied in a library study and sub items of this capitals is determined. In the second stage of the research, two main hypotheses and seven sub-hypotheses in the field of intellectual capital and the relationship between the components of intellectual capital and performance in some Iranian hospitals were considered. Then, the hypotheses were examined and analyzed by SPSS software. The statistic society of this research was of all directors, deputies, administrative and financial managers of Kermanshah University of Medical Sciences. The questionnaire was distributed between 195 persons that had been selected randomly from static society. Obtained data were analyzed by regression and correlation techniques. The outcomes showed that there are some correlations between intellectual capital, s components and performance.   Key words: Intellectual capital, performance, human capital, structural capital, hospital.