PURPOSE: An automatic welding device is provided to ensure welding quality by allowing the user to control the feed rate of welding wire according to the type of a base material or welding wire. CONSTITUTION: An automatic welding device comprises a welding torch(110) and a controller. The welding torch is formed in one side of a holder and includes a gas nozzle(113), a wire feeder(120) and a switch. The wire feeder automatically supplies welding wire(140). The switch controls the gas supply to the gas nozzle. An electrode rod(114) is formed inside the gas nozzle. The controller applies electricity to the torch and a base material(30).
