Abstract: This article traces the evolution of foreign policy priorities of the Western Balkan countries in the context of their European and Euro-Atlantic integration over the period from the mid-1990s to 2020. The key goal lies in the analysis of formation and development of the European and Euro-Atlantic vectors in foreign policy of the Western Balkans. The relevance of the selected topic is defined by fact that all Western Balkan countries are somehow involved in the European and Euro-Atlantic integration processes, which prompts transformations in their home and foreign policy. In post-Cold War era, the Western Balkans depart from their foreign policy course, which they have followed since the end of the World War II. The conflicts that were related to dissolution of Yugoslavia underline the expansion of influence of the North Atlantic Alliance as the major “peacekeeper”, and the European Union, which took on the role of post-conflict settlement. In the under their influence. Tracing the evolution of foreign policy priorities of the Western Balkans within the framework of their European and Euro-Atlantic integration defines the scientific novelty of this research. The acquired conclusions can be implemented in theoretical and practical activity. The article explores the regional initiatives of NATO and EU, which were aimed at stabilization of the Western Balkan region through transformation of state and social institutions, development of interstate cooperation, and involvement in regional integration processes. For determination of the role of the European Union and NATO in foreign policy of the Western Balkans, the author analyzed the doctrinal documents of the Western Balkan countries, which highlighted the priority of European and Euro-Atlantic vector.