Since the ratification of the Stabilisation and Association Agreement in 2001, there were a lot of tasks for Croatia to solve. In economic, judicial and political terms had Croatia to approach to the European standards. Not an easy task, because the transition of the South East European countries towards democracy and market economy was characterized by corruption. The fight against corruption is not only a political criterion for Croatian membership in the European Union, but also a necessary condition for economic and social progress.As part of this masterthesis is to be examined whether the anti-corruption measures in the past decade have led from 2002 to 2012 to a reduction of corruption in Croatia and whether the quality of the public environment has an influence on the reduction of corruption.The basis of the thesis form empirical studies of perception of corruption or articles and papers on corruption development in Croatia. In addition, reports of the European Union - in particular the Group of States against Corruption (GRECO) and the European Commission - analyzed from the last few years. The thesis also deals with the concrete anticorruption programs in Croatia, preventive measures, including anti-corruption from a law enforcement point of view including the statistical data of the Croatian Bureau of Statistics. It analyzes international corruption perception barometer and national studies, which will give an insight into the corruption experiences of Croatian citizens. The function of society in the fight against corruption is discussed and some relevant actors in the anti-corruption fight in Croatia introduced. In addition, individual chapters are rounded with the conducted expert interviews to represent the current problems in Croatia even better.