Purpose – This study aims to analyze the literature on knowledge management on intellectual capital, social capital and its contribution to Iranian companies’ innovation. Design/methodology/approach – To investigate knowledge management’s relationship on intellectual capital, social capital and innovation, using structural equation modeling based on data collected from 205 chief executive officers, production managers and marketing managers of Iranian companies. The research instrument is a standard questionnaire consisting of 109 questions in which 5 of them are demographic questions, 26 questions were asked to reveal the knowledge management process, 40 questions for intellectual capital, 21 for social capital and 17 for innovation. Findings – The results show that knowledge management has a positive and significant relationship between intellectual capital and social capital. Knowledge management did not have a significant effect on innovation. However, intellectual capital and social capital have a significant effect on innovation. On the other hand, knowledge management mediated by intellectual capital and social capital has a positive and significant indirect effect on innovation. Originality/value – The paper includes the implications for developing knowledge management and intellectual, social capital leading to innovation in manufacturing companies. Knowledge management can improve the innovation performance of a company if it is shared and applied effectively. This study addresses an important subject and the findings may be used by professionals and managers or another person interested in advancing knowledge management that leads to innovation.

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