To provide a rice hull combustion device capable of generating electricity under utilization of combustion heat of rice hull and capable of promoting combustion of the rice hull.

In a rice hull combustion device, a blower 12 for blowing out air through air holes 18 below a combustion table 17, an air blowing pipe 13 and an air casing 14 are installed, a screw conveyor 3 is installed inside to be contacted with the combustion table 17 and a fuel supply device 16 provided with a rice hull hopper 4 at its upper part is installed. Further, in order to drive the screw conveyor 3, there are provided sprockets 7, 10, a chain 9 and bearings 6. Combustion heat is generated under application of this rice hull combustion device, water is heated with this combustion heat to generate steam to cause a steam turbine or a steam water wheel to be rotated. With this arrangement as above, electricity is generated with a power generator cooperated with it.