A newly isolated mushroom strain Lentinus tuberregium, was cultivated, and evaluate d for nutritional profile (whole mushrooms) on dry weight basis for their proximate, mineral compositions. The cultivated mushroom accumulated h igher concentrations of carbohydrates (55.8%) and protein (25%), moisture (9.4%) total as h (4.7%) crude fibre (3.6%) fat (1.6%) potassium (7.53mg/gm) calcium (2.66mg/gm) magnesium (2.45mg/gm) sodium (1.2mg/gm) iron(0.53mg/gm) copper(0.11mg/gm) zinc(0.41mg/gm) m anganese(0.08mg/gm) energy(338kcal) concentrations. Of the nutritive elements analysed, potassium was the most dominant with concentration as high. Followed by calcium, magnes ium, sodium respectively.