Solar and biogas integrated hybrid dryer for drying of button mushroom (Agaricus bisporus) and oyster mushroom (Pleurotus ostreatus) was developed in Department of Renewable Energy Engineering, CTAE Udaipur. The white button mushroom (Agaricus bisporus) and oyster mushrooms (Pleurotus ostreautus) of uniform size were thoroughly washed under tap water, sliced into 3±0.5 mm thick slices and pretreated with mixture of 0.5% citric acid and 0.5% ascorbic acid before drying. Solar energy and biogas produced from codigestion of spent button mushroom substrate and cowdung substrate were used for drying of mushroom. Drying was optimized in such a way that constant temperature of 50 °C was maintained throughout drying of mushroom. It was found that the button mushroom was dried from moisture content of 91% (w.b.) to 8.257 % (w.b.) in 11 hrs with average solar radiations availability of 560 W/m2 and biogas consumption of 700 L. The oyster mushroom was dried from moisture content of 90% (w.b.) to 8.41 % (w.b.) in 10 hrs with average solar radiations availability of 578.37 W/m2 and biogas consumption of 600 L.