To realize user convenience and to reduce energy consumption by shortening the time until the temperature of a floor material becomes appropriate and the temperature of a room becomes comfortable in a floor heating device.

In the floor heating device, the floor material is instantaneously heated by using a Peltier element in an exothermic body heating the exothermic to the temperature higher than in the conventional floor heating device, and before an overheated condition, the exothermic body is cooled by the Peltier element to prevent an overheated condition, and the room is heated by transporting waste heat generated accompanying the cooling into the room.