To provide an incinerator to prevent the occurrence of black smoke environmental pollution when a substance to be incinerated is incinerated and also suppress the generation of dioxin.

A charge port, an intake 14, and an output port are formed in the side wall of an incinerator body 1. A grate is situated in the incinerator body 1. An exhaust cylinder 2 is situated at the upper part of the incinerator body 1 with a part of a base end part introduced in the incinerator body 1. The base end part of the exhaust cylinder 2 is closed with a bottom plate 20, and an exhaust hole 21 is formed in the side wall of a part introduced in the incinerator body 1. An air supply duct 31 on the external side and an air supply duct 32 on the internal part side are connected to a blower. A supply pipe 311 of the air duct 31 on the external part side has an air outlet 312 extending through an upper curved plate and situated in an introduced state to supply air to the inner upper side of the incinerator body 1. The tip side of the air supply duct 32 on the internal side is introduced in the incinerator body 1 and an air injection member 33 is attached to its tip.