To develop new nutraceuticals from mushrooms, nutritional properties of two kinds of Hypsizygus marmoreus fruiting bodies were investigated. Hypsizygus marmoreus (white) contained 21.63% H. marmoreus (brown) contained 27.34% of crude protein, 55.75% of total sugar, and 2.69% crude lipid and 7.77% ash. It also contained 10.04 mg% Na, 19.28 mg% Ca, 9.30 mg% Fe and its calorie value was 356.57 Kcal per 100 g. Free sugar and amino acid content of H. marmoreus (brown) were determined.