In the paper the concept of Shared Service Center (SSC) for public administration is introduced. Processes and models of SSC are defined, but from the point of view of one of the main purpose of public administration– delivering public services. It is proposed to, while planning and implementing SSC, not only focus on designing services for organizational units participating in the SSC, but also to design solution for e-services for citizens. So the emphasis should be put, not only on modelling supporting processes just like for planning the implementation of commercial SSC, but also on core processes. Specific legal solutions are also pointed out, which are supporting this concept, from the point of view of organization of SSC (new Polish legislation) and from the point of view of funding the development of SSC (European Union operational programs supporting e-services for A2A and A2C).