On 25th January European Commission introduced draft Regulation Of The European Parliament and of the Council on the protection of individuals with regard to the processing of personal data and on the free movement of such data (general data protection regulation); as a result of EU data protection reform works. The Commission’s proposals, makes significant change in future position and role of Member States’ supervisory authorities. It will be a result of several precise duties imposed on those bodies, which regard execution of mutual cooperation principle as well as joint operations. Important meaning will also have relation between states supervisory bodies and the Commission,by virtue of consistency mechanism and legislator powers given to the Commission. Above mentioned proposals on legal solutions, lead to necessity to assess the principle of supervisory authorities’ independence (which is described in details and strengthened in the draft Regulation) in relation to European authorities. Although European legislator took care for several independency guarantees in organisational a financial manner, it is possible that in legal dimension the predicted purpose will not be achieved. Consistency mechanism proposed in draft Regulation is very wide in subjective scope and allows the Commission to control directly means taken by state supervisory bodies, by issuing implementing acts. As a consequence of such a mechanism, the independence ofthose bodies in relation to the Commission will be undoubtedly, significantly limited. It is disputable whether state supervisory authorities will be able to keep independence prescribed by article 47 p.1. of the draft Regulation, in its full scope. It must be emphasised that Regulation as directly applicable will become a part of domestic legal order in Poland. If it will come in to force in currently proposed wording, the polish supervisory authority – Inspector General for the Protection of Personal Data, will be a part of European data protection system, and will be obliged to fulfil its duties in respect of European Union authorities (The European Commission and European Data Protection Board).