PROBLEM TO BE SOLVED: To apply a further energy saving countermeasure to an electric motor controller which controls, based on the operation of an operating device, the drive of an electric motor to which electric power is supplied from a battery.SOLUTION: This electric working machine includes: a battery unit for supplying electric power to the electric motor through a power feeder； a power feed switch for switching the power feeder between the current carrying state and the cut-off state； the operating device provided on a signal line； a controller for outputting a control signal for controlling the power feed switch to put the power feeder in the current carrying state to the power feed switch based on the operation of the operating device detected through the signal line； a capacitor, one end of which is connected to the signal line； and a current switching device for throwing a weak current to the signal line when the controller sleeps and throwing a large current when the controller wakes.
