The article concentrates on analysis of motives, level and functions fulfilled by foreign exchange reserves in developed countries, with special emphasis put on the dual system of reserves within Economic and Monetary Union (EMU). The foreign exchange reserves of industrial countries have grown up during the last decade. However, in the case of EMU this growth have been not due to the intentional policy of the central bank (as in the case of Japan and Switzerland), but due to positive changes of exchange rates and rates of return.Artykuł koncentruje się na analizie motywów posiadania, poziomu oraz sposobów wykorzystania rezerw walutowych w krajach rozwiniętych, ze szczególnym uwzględnieniem dualnej struktury rezerw w ramach Unii Gospodarcze...