Web 2.0 applications have attracted considerable attention among knowledge workers as a means via which they can connect to peers for knowledge sharing. Web 2.0 use has potential to facilitate knowledge transfer in a much more improved way compared to previous communication tools. Despite of its benefits, there is limited research on adoption behaviour of these technologies. We propose a model linking knowledge sharing and seeking factors to web 2.0 acceptance among knowledge workers. Proposed research model is based on the extended attitude-behaviour framework. The model shows that attitudes towards sharing and seeking, determined by their salient belief sets, could have an impact on web 2.0 use. This study will make important contribution to IS area as it attempts to investigate the influnce of drivers from two motivational domain i.e. knowledge sharing and seeking on technology acceptance based on an integrated theoretical framework