The article reveals the features of the system of legal guarantees for the implementation of the administrative-legal status of the Commissioner for ECHR affairs. It was established that it is not enough to enshrine the rights and duties of a public servant in national legislation, it is necessary to provide forms (legal procedures) and guarantees of their implementation (legal guarantees). Precisely because of this, when the activity of a subject of public administration or an individual public servant becomes ineffective, the question arises about the guarantees that ensure its activity and contribute to the realization of its legal status. It has been proven that the material guarantees of the realization of the administrative-legal status of the Commissioner for ECHR cases are fixed mainly by the norms of national legislation, while the organizational guarantees - by the norms of European legislation, which is clearly confirmed by the provisions of national and European legislation. It is emphasized that the state «Ukraine» (represented by the Commissioner for ECHR affairs), as a party to the case under consideration at the ECHR, has its own set of legal guarantees that allow protecting the authority of the country as a democratic, legal and social state that resolves all issues based on the priority of human and citizen rights and freedoms. It was concluded that the guarantees of the implementation of the administrative and legal status of the Commissioner for the ECHR are the means of direct implementation of the tasks, functions, rights and duties stipulated by the acts of national and European legislation, which are fixed for the position of the Commissioner for the ECHR. It has been proven that the guarantees of the implementation of the administrative and legal status of the Commissioner for the ECHR include: 1) the norms of administrative law that establish the legal status of the Commissioner for the ECHR, namely, the tasks, functions, rights and duties assigned to this political position ; 2) principles of consideration of the case at the ECtHR; 3) legal institutions of additional legal, social or other assistance and support; 4) forms of procedural activity of the ECtHR; 5) actions of individual participants in the process. It was established that none of the national or European acts analyzed by us provide for coercive measures that would be applied to the Commissioner for ECHR cases as a person who poorly or ineffectively fulfills his official duties. It is proposed to enshrine the grounds of «responsibility» of persons holding political positions in the system of executive authorities in the national legislation.