Abstract: A waste heat treatment apparatus includes a waste accommodating chamber for holding and burning waste placed in the chamber which is positioned in an outer housing that also holds a recombustion section for after burning the burning gas. An ash pan collects waste after the burning and/or after a sterilization for removal from the outer housing. An exhaust fan exhausts the burning gas out of the outer housing. A catalyzer is positioned in a gas passage between the recombustion section and the exhaust fan. The waste accommodating chamber includes a heater for burning the waste, and the recombustion section includes a further heater for after burning the gas generated by the burning. This structure provides a relatively simple device which is compact and portable, whereby installation near the spot where the waste is produced, is facilitated.