Abstract: Intellectual capital at the level of macro-management and the management of organizations can create new understanding of economic-social system and taking into account a broad range of organizational and management requirements and the growing importance of accurate knowledge, we must try to understand the factors affecting and influencing it. The aim of this study was to assess the role and effectiveness of the relationship between intellectual capital and knowledge management in the organization. The population consisted of staff of Al-ghadir Research Institute. To achieve the main purpose, researcher at the start of the study and a main hypothesis of effort put into the design of three subsidiary ones. Intellectual capital three dimensions of human, structural and communication and knowledge management to five; collect knowledge, storing knowledge; knowledge of constant refinement, use of knowledge and knowledge distribution, were divided. Questionnaire validity by content validity methods andstructural analysis by Lisrel software which shows the validity of the questionnaire was obtained and reliability through Cronbach’s alpha 0.89 and 0.91 obtained which indicates an acceptable validity. Data analysis was performed using SPSS statistical software.All three sub-hypotheses and main hypothesis were confirmed.