The purpose of this study is to discuss the guarantees of independence of the national supervisory authority in the light of the provisions of Regulation 2016/679 and national constitutional and statutory provisions. Ensuring the independence of the supervisory authority is recognized as one of the basic European standards for the protection of personal data. Independence manifests itself in the impossibility of issuing guidelines as to the manner of operation, limiting or eliminating the possibility of interfering with pending proceedings, limiting the impact on staffing. It is the independence of the authority that is intended to ensure the effectiveness and credibility of the supervision of compliance with the provisions on the protection of personal data of individuals.