STOKER FURNACE

This stoker furnace (1), which comprises a feeder (4), a drying stage (11), a combustion stage (12), a post-combustion stage (13), and a discharge chute (17), has: a front arch (31) extending from the upper side of the feeder (4) to the upper side of the drying stage (11) or the combustion stage (12); a rear arch (32) extending from the upper side of the discharge chute (17) to the upper side of the post-combustion stage (13) or the combustion stage (12); and a square tubular furnace wall (33) that guides and discharges exhaust gas generated by the combustion of an object (B) to be incinerated, wherein the drying stage (11) is disposed to be inclined such that a downstream side thereof in a transport direction faces downward, the combustion stage (12) is disposed to be inclined such that a downstream side thereof in the transport direction faces upward, and the post-combustion stage (13) is disposed to be inclined such that a downstream side thereof in the transport direction faces upward, so that the main surface of each of the drying stage (11), the combustion stage (12), and the post-combustion stage (13) faces a main combustion part (M) created above the combustion stage (12).