The purpose of the article is to indicate the place of social capital in the structure of the value of modern enterprises. The growing number of researchers are interested in the concept of social capital, where they see a significant source of competitive advantage. The increase of enterprises' innovativeness, increase of motivation to act, development of cooperation with partners have been presented in the article as effects of social capital. The space for building social capital in the enterprise is intellectual capital. The article focuses on the so-called social models of intellectual capital, which are based on the assumption of creating intellectual capital through the use of social relations. Examples of social intellectual capital are models presented by McElroy and also by Bratnicki and Strużyna.