PURPOSE: To obtain an offensive gas incinerator which has a low running cost with a simple structure.

CONSTITUTION: The offensive gas incinerator comprises a watertight chamber 41, a heating chamber 45, an incinerating chamber 50 and an exhaust cylinder 5. An incinerating tray 51 formed in a dome shape of stainless steel is installed at a lower part of the chamber 50. The tray 51, having many pores 52, is heated by a gas burner 4 in the chamber 41 so that it may become red-hot. Offensive gis is passed through the pores 42 of the red-hot tray 51 via the chamber 41, and xylene, toluene, etc., are thermally decomposed at this time.