The research topic of this work is the role of the CNB in the financial market of the Republic of Croatia. The final paper tries to answer the question: "Does the CNB perform its stake in the financial market efficiently and in accordance with the goals set?". After a review of the theoretical framework of problems such as the history and formation of the central bank of the Republic of Croatia and key components and concepts such as inflation, interest rates and exchange rates, the movements of active and passive interest rates, the EURIBOR interest rate and the expiry interest rates and movements of IPC, HIPC and the CNB's foreign exchange rate. It is explained which are the features of the money market and how monetary policy affects interest rates and price stability An analysis of the evolution of the discount rate from 2008 to 2018 has also been made, as the tendency of falling them is determined. In addition, in the context of the explanation of inflation terms and their impact on price stability and financial market, HIPC analyzes the flow of inflation through the above methods, apart from the Croatian index, establishes trends in the selected comparison countries. The theoretical basis for the development of exchange rates through history is described together with the definition of the exchange rate system used by the CNB and the Republic of Croatia. Also, the importance of the stability of the kuna / euro exchange rate with the corresponding tabular and / or graphical representation as well as the way of forming the middle exchange is described. The conclusion, at the very end of research and final work, brings together all the above and presents the final position on the CNB's effectiveness in implementing the core objectives and role of the central bank on the financial market of the Republic of Croatia.