This bachelor thesis is focused on the definition of tax evasion and more character in the context of tax havens within the European continent. Its goal is to monitor the consistency of these two phenomena. The first part deals with general tax havens, and analyze the specificities of European tax havens and the influence of the EU. In the second part attention is paid to tax evasion, with a focus on international tax evasion, which are realized by a low-taxing country. Here is said division of tax evasion , methods and methods of their measurement. The final part discusses international organizations fight against tax havens as tax evasion agents, the history of this struggle, and prospects for the future