DOOR MIRROR HEATER

To provide a door mirror heater for a vehicle such as a motor vehicle or the like on which a high voltage battery is mounted, a door mirror heater compliant to a high voltage battery having a heat generating circuit provided with a PTC layer corresponding to a heating element and electrodes for applying a current to the PTC layer is structured such that an initial resistance value of the heat generating circuit is set between 20 and 200 OMEGA , more preferably between 50 and 100 OMEGA , a lower limit value of a PTC characteristic R100 DEG C/R25 DEG C is set to 10, more preferably, to 50, and a rubber is added to a main material polymer of the PTC layer, and a metal oxide is added as a filler.