Thermocouple Welder with Foot Switch is suitable for welding thermocouple wires of different material to steel or alloy steel plate. The Thermocouple Welder is designed in such a way that one terminal is connected to plate by earth magnet, while thermocouple wire to be welded is being held in nose player and kept in contact with plate. The Thermocouple Welder is provided with foot switch to weld the wire on the plate. Thermocouple Welder operates on a power supply rate varying from 100~120V or 220~240V AC. Thermocouple Welder with Foot Switch enables capacitors to be charged to different voltages to get different values of weld current.