To provide a stirring combustion method and a device of the same capable of stably carrying out complete combustion of biomass fuel such as hulls or straws and effectively using it.

The stirring combustion device 1 includes a heat chamber 3 provided with a combustion tray 2 forming a hearth in a lower end and deposited with the biomass fuel in an interior, a stirring means 4 for stirring a lower layer portion corresponding to at least a combustion tray 3 of the biomass fuel deposited in the heat chamber 3, an air supply means 5 for supplying combustion air to the lower layer portion corresponding to the combustion tray 3 of the biomass fuel deposited in the heat chamber 3, and a fuel supply means 15 for supplying the biomass fuel from an upper end side of the heat chamber 3. The combustion air is supplied while stirring the lower layer portion corresponding to the combustion tray 2 of the biomass fuel deposited in the heat chamber 3 to form a hearth, and a deposit layer height of the biomass fuel in the heat chamber 3 from the upper end side of the heat chamber 3 is maintained within a predetermined range to appropriate cinder of the hearth discharged from the combustion tray 3 to continue combustion.