To provide an incombustibles discharge device that does not allow any air-passable cavity to be generated in incombustibles discharged from the outlet of a fluidized incinerator.

This incombustibles discharge device is provided with an introducing port 22 through which the incombustibles d discharged from the outlet 6 of the fluidized incinerator 1 in which an object a to be burnt is burnt in a fluidized bed are introduced into the device, a depositing section 21C in which the incombustibles d introduced through the port 6 are caused to deposit, and a moving mechanism 26 which moves the incombustibles d caused to deposit in the section 21C to the opening 24 of the section 23 and discharges the incombustibles d from the opening 24. This device is also provided with a discharge chute 8 which leads the incombustibles d discharged from the discharge port 6 of the incinerator 1 to the introducing port 22. The chute 8 is constituted to make the incombustibles d discharged from the discharge port 6 to form a single flow toward the introducing port 22 from the discharge port 6 in the chute 8.