To provide a combustion heater preventing pollution of indoor air due to leaking of kerosene odor from a body gap or the like of a combustion heating device.

The combustion heating device is provided with a combustion part 2 provided in a body 1, a blower 3 for supplying air to the combustion part 2 and blowing out hot air from a hot air supply opening 6, a fixed tank 8 supplying fuel to the combustion part 2, a cartridge tank 9 supplying fuel to the fixed tank 8, a tank chamber 10 holding the cartridge tank 9, and an air cleaning unit 11 attached to the body 1 and having a second blower 12, a suction opening 13, a supply opening 14, and a filter 15. A vent hole 17 exhausting air in the tank chamber 10 is provided in a neighborhood of the suction opening 13 of the air cleaning unit 11.