Much research has been done on the favourable influence of social environment and social networks on knowledge production. The aim of this article is to design a theoretical framework where both information behaviour (IB) research and social capital (SC) research are integrated. Integrating these areas is seen as an advantage when focusing on the social construction of knowledge, and a model is proposed to illuminate sources and consequences of social capital and knowledge sharing. This framework will function as a basis on which to build when the authors proceed with a number of empirical studies involving the university context, social networks of the unemployed, and virtual networks of young people. © CILIP.