Daily precipitation data from APHRODITE's Water Resources with a spatial resolution of 0.25˚for 57 years has been used to detect the trend of precipitation in Azerbaijan Republic.First of all monthly, seasonal and yearly maps and regional mean time series calculated. According to the annual map mean annual precipitation of the country is about 410 m.m there are two precipitation maximal is Azerbaijan ;one in northern part (Şahdağ and Bazardüzü )and the other one in south Western part of the country (Lankaran region).Throughout the country precipitation maximum occurs in spring and winter. Trend analysis of annual time series shows a decreasing trend that is significant in 96 percent confidence level .The same situation is true for summer and winter .