In the Polish Public Procurement Law, the role of a contracting authority is focused on the preparation to the process of a public contract award. However, it is difficult to approve of the thesis according to which the role of a contracting authority is limited solely to the application of the provisions of the Public Procurement Law. There is no legal analysis to confirm how important the participation of a contracting authority is in the investment planning and cooperation at every stage of the investment. The technological process of the public contract performance void of activities undertaken by a contracting authority may end as a failure, either economical, qualitative or even legal.