The scientific article examines the activities of the European Court of Human Rights and identifies the significance of the relevant case law of the European Court for the case law of Ukraine. It is noted, that one of the issues, studied within the topic, is the sources and legal framework, which is especially relevant in the adoption of the Law of Ukraine «On Enforcement of Decisions and Application of the Case Law of the European Court of Human Rights», according to which courts use the Agreement and case law as a legal source in cases. The activity of the European Court of Human Rights, the role and impact on the judicial system of Ukraine are analyzed, the relevant examples are given. It is concluded, that the implementation of international human rights law into Ukrainian law is a complex procedure that requires special doctrinal consideration, as today Ukrainian citizens are among the most active complainants to the European Court of Human Rights, which indicates a fairly high insecurity by national legal mechanisms. In order to increase the credibility of the judiciary, courts should take into account the European experience, decisions and observations of the Court in their work. The Court's case law is said to play an important role in the judicial reform process as it approaches the European legal framework for human rights standards in Europe. The current law cannot fully protect a person or build justice if it is not applied properly. Based on existing ECtHR rulings, judges can accurately understand the rule of law and apply it properly, which will help improve human rights, accurate understanding and implementation of the Agreement on Ukraine. Based on the study, it was concluded, that it is necessary and appropriate to implement the decisions of the European Court of Human Rights, as in this way it is possible to ensure the protection and defense of human and civil rights and freedoms