Abstract: In this household electrical steam generator, particularly for smoothing irons, the water level within the boiler is stabilized by electronic and/or pneumatic action, electronic action being actuated by a temperature sensor positioned on that portion of the body of a usual armoured resistance element which is subject to emergence following reduction in the water level, to activate a make-up micro-pump transferring into the boiler cold water drawn from a reservoir, pneumatic action being actuated by a floating valve enabling air to enter during boiler cooling, in order not to enable the boiler to draw water from the reservoir through the body of the halted micro-pump.