Provided is a welding helmet maintaining a power-on state after initial power is applied thereto, the welding helmet including: a circuit unit controlling a shutter liquid crystal display (LCD) based on at least one of whether welding light exists and an intensity of the welding light； a power supply unit supplying power to the circuit unit； and a switch unit controlling electrical connection between the circuit unit and the power supply unit, wherein after being initially switched to an on state, the switch unit maintains the on state.
