To increase supply power for generating steam without increasing rated power.

A steam heater circuit 8 and an additional heater circuit 9 connected to the line voltage of an electric heater 2 in an iron 1 are disposed inside a steam generator 7 to which steam is guided to the iron 1 by a hose 5, an electric heater circuit is made to be an open state by a thermostat when the iron is heated to prescribed temp. and the additional heater circuit becomes a closed state by a relay 14. Then, a configuration is attained in such a way that power to be supplied to a steam iron station simultaneously by the both of the electric heater circuit and the steam heater circuit indicates the max. value of the rated power of the line voltage, power to be supplied to the steam iron station independently by the additional heater circuit indicates the max. value of rated power and the value is larger than that of power to be supplied by the steam heater circuit.