PURPOSE: To provide a device which accumulates the ash that settles down on the combustion gas discharge channel of a refuse incinerator and by which the accumulated ash can be easily discharged to incinerator, etc.

CONSTITUTION: An ash discharge device that is provided at the ash settling section 52 in the flow channel through which the combustion gas is discharged from the primary combustion chamber of an incinerator is provided with a down-stage side ash accumulation surface section 3 that has its floor face 53b formed in circular shape by the upright brim section 54 and has a port 30 for discharging the ash opened on one end side of said floor face 53b and a scraper 4 that is rotatably supported on a bearing in the circular central section of said ash accumulation surface section and rotated by a geared motor 21 on the ash accumulation surface section. Said ash accumulation surface section is provided in the lateral direction in two stages, and at the same time at the side of the ash accumulation surface section 3 that is on the lower stage and at a position higher than the scraper 4 an upper stage side ash accumulation surface section 1 and scraper 2 are provided, and one end of said upper stage side ash accumulation surface section 1 is cut off in semicircle shape and said lower stage side ash accumulation surface section 3 is arranged in the lower stage.