An electrical heating device electrically heats a material to be heated by supplying an electric current flowing between a plurality of electrodes. The electrical heating device includes a temperature detection device which detects temperature information of a plurality of areas of the material to be heated, a supplemental heating device which heats each of the plurality of areas of the material to be heated, and a controller for controlling heating of the material to be heated. During the electrical heating, the controller controls, based on the temperature of each of the plurality of areas of the material to be heated detected by the temperature detection device, the supplemental heating device so that the supplemental heating device heats at least one area or all of areas having a temperature lower than the temperature of an area having a highest temperature among the plurality of areas.