Above ground biomass studies of Quercus semecarpifolia Sm. forest, that extends throughout temperate regions in Nepal, has been carried out at six different localities namely Suke Pokhari, Deurali, Shivapuri, Phulchoki, Chotra and Chankheli Lekh in eastern, central and western part representing two plots on each site respectively. The altitude ranged from 2410 to 3260 m. The study was conducted in 1600 m² plot in all the localities. Above ground tree layer biomass was found to be 479.17, 357.53, 462.60, 358.02, 272.15 and 304.21 t/ha from East to West respectively. Basal area coverage ranged from 7.36 to 12.32 m². Immediate attention for the sustainable supply of fodder and fuelwood has been felt urgent and keeping in view the ecological role of vegetation on the environmental protection a scientific management of the forest ecosystem as a whole for long-term planning has been stressed.