To provide a garbage disposal device in which thermal energy consumption is little and safety is high.

A garbage disposal device has a drying furnace 1 in which garbage is put, an agitator 2 equipped with agitating blades 21, a heater 3 equipped with a heating element 31 for heating garbage from outside the drying furnace 1, a vacuum pump 4 for sucking gas in the drying furnace to evacuate it, a deodorizing chamber 5 for introducing the gas sucked by the pump to deodorize it, a garbage feeding port cover 6, a garbage dried matter takeout port cover 7, an exhaust cylinder 8, an air supply pipe 9 for introducing air into the drying chamber 1, a cock 10 for adjusting the quantity of air intake, and so on. In this way, since the drying furnace 1 is evacuated to lower the saturated steam temperature, garbage is dried by low temperature heating to save energy and to improve safety.