The thesis is dedicated to the investigation of the international legal aspects of protecting and ensuring human rights in the European international organizations. The thesis stipulates that besides the universal system of human rights protection the most effective regional system of human rights protection has been the European joint system of human rights protection that involves the system of the Council of Europe, the system of the Organization for Cooperation and Security in Europe and the system of the European Union. Although these organizations were founded to bring peace and stability to Europe, they were established with different purposes. For instance, the Council of Europe promoted the rule of law, human rights and democracy; the European Union was established as an institution for promoting trade and economic stability for its members; the Organization for Security and Cooperation in Europe was founded to maintain peace and military security within Europe. Although the fact that each of these organizations has its own historical development, aims and principles, they are consolidated by the issue of human rights protection. The European international organizations – the Council of Europe, the Organization for Cooperation and Security in Europe and the European Union – are the leading innovators both in forming their standards in the sphere of human rights protection and proper and effective functioning of the unique European human rights protection system within the mutual European extension, taking into consideration the efficient and appropriate mechanisms. The author explores the division of human rights into generations – civil and political, social and economic, collective, biological, ecological etc. Therefore, the author defines the concept of generations as further steps of the community development. In accordance with the mentioned concept and taking into account the development of the biological and ecological human rights, the appearance of such rights will require their efficient guaranties from the European community. The Council of Europe, the Organization for Cooperation and Security in Europe and the European Union collaborate in different spheres, particularly human rights (including the rights of national minorities), pluralist democracy, the rule of law, human dignity, freedom, democracy and equality are the values which are common for them. They have been reinforced by the Charter of Fundamental Rights of the European Union. It places the individual at the heart of its activities by establishing the citizenship of the Union and by creating the area of freedom, security and justice.