During last eight years a lot of positive changes in the raw material base of Polish dairy industry has occurred. These changes concern the growth of milk production with the simultaneous reduction in the cow stock. In both analyzed periods of years 2000-2003 and 2004-2007 the milk purchase demonstrated an increasing tendency. The situation has developed differently for the average prices payed to producers. In the first period they demonstrated a decreasing tendency. In the case of both of the mentioned issues a changeability in the annual cycles has occurred. When comparing the seasonality indices of milk purchase and milk purchase prices in both analyzed periods, it should be noticed that the purchase of milk was marked by a considerably higher amplitude of fluctuations than the milk purchase prices. The analysis shows that differences between seasonality indices of milk purchase and milk purchase prices are smaller after introducing the quota system in Poland. In both periods in months from May to September seasonality indices of milk purchase are higher than average. At the same time purchase prices have lower seasonality indices than average. / Synopsis. W opracowaniu przedstawiono sytuację na rynku mleka w Polsce w latach 2000-2007. Scharakteryzowano w ujęciu dynamicznym dla całego badanego okresu pogłowie krów mlecznych, produkcję mleka, a także kształtowanie się cen oraz wielkości skupu tego surowca. Dokonano również analizy wahań sezonowych wielkości skupu mleka realizowanego przez przemysł mleczarski oraz cen skupu w okresie przed i po wprowadzeniu systemu kwotowania produkcji tego surowca w Polsce.