Biomass gasification means incomplete combustion of biomass resulting in the production of combustible gases consisting of carbon monoxide, hydrogen and methane. Amongst the renewable energies, the biomass is the most important energy source. Three types of biomass are available, one generated during the processing of wood in timber mills, another is energy plantation and third bio-residues generated during the processing of agricultural produce. Due to a booming population and increasing needs in life quality all over the world, energy demand is undergoing a great increase. To find alternative fuels and to increase the contribution of renewable energy to world-wide energy production, biomass wastes must be used for energy production. This book examines the importance of biomass gasification and assesses the possibility of biomass exploitation as an alternative to conventional fuel.