The master thesis focuses on the economical development of Europe after the fi-nancial crisis and the steps used by the ECB needed for the recovery of the Europe-an economy. The empirical part analyzes the quantitative easing of the ECB and its delayed impact on inflation. The second part of the empirical master thesis re-searches the quantitative easing of the ECB and its impact on the rentability of commercial banks in the Eurozone (Deutsche Bank, BNP Paribas) and identifies factors with the strongest impact on the chosen commercial banks as well. The rentability analysis of commercial banks and the impact on inflation is made by a regression time-series analysis.