Sour cherry is one of the most attractive processing fruits in terms of nutritional value and sensory properties. It is characterized by intense red color, sour-sweet taste and it consists of many beneficial for health bioactive components. However, the processing procedures such as washing, cooking, pasteurization, conducted on a large scale, may cause a reduction in biological activity ingredients, making the final product in the form of jams, juices, nectars, is not as attractive in terms of nutrition. Furthermore, the amount of fruit is added to the pro- duct is low. So, the aim of this study was to assess chemical value, antioxidant activity and physicochemical composition of sour cherry commercial products. Conducted research has shown, that sour cherry products are diverse in terms of chemical composition and content of biological activity compounds. Such a large variation of physicochemical parameters depends not only on the type of product, but also of the technology and prescription, that is from the manufacturer.