Accession to European Union is major aim for many European countries, and that trying is intensive when we having on mind unstable political and undeveloped ex-socialistic countries. These countries in EU find economic prosperity and political stability, but process of their integration in EU was faced with many problems. Searching for solution of those problems and ensure successful adjustment to standards of EU, EU was created special financial instruments for support candidate countries on their accession. Each country is responsible for thier own advance, financial sources are allocated with aim through concrete projects. Because specifics in region, EU created special access strategy and instruments of financial supports to West Balkan countries. In paper authors will research instruments which EU use for support economic, political and legal adjustments and harmonization in candidate countries and potential candidate countries and concrete effect which had financial support to West Balkan countries. Further, paper will content structure of financial source from pre-accession funds and purpose of using, reach phase in process of negotiation with EU and bring up with roblem sin all West Balkan economies. PUBLICATION ABSTRACT