The purpose of this diploma thesis is to examine the efficiency of monetary policy -- impact of monetary policy upon price stability - in relation to main target of Czech National Bank (CNB). The research approach is the analysis of monetary indicators -- price level, interest rates, money supply and exchange rate. In the context of the financial stability the thesis also analyzes another important function of CNB - supervision of Czech financial market using indicators of capital adequacy, banking sector liquidity, profitability of banks and volume of non-performing loans. Theoretical part of the thesis explores quantity theory of money, business (particularly monetary) cycle theories and further describes practical use of monetary policy ...