To provide an electrode device for a high temperature electric furnace such as a graphitizing furnace, a reaction sintering furnace and the like, capable of preventing the accumulation of sediments on a clearance between a furnace inner wall and an electrode inserted from the furnace inner wall, preventing a trouble such as the interruption of the operation of the furnace caused by the insulation failure and the like caused by the sediments, dispensing with the sediment eliminating work, and achieving the maintenance-free of the electrode insertion clearance part.

This electrode device is inserted into the furnace from the furnace inner wall through a furnace shell part 1 and the furnace inner wall 2 positioned inside of the furnace shell part of the high-temperature electric furnace, and connected to a heater composed of a resistance heat generator 3B mounted in the furnace of the high-temperature electric furnace. A gas introduction pipe 10 for spraying a gas toward the inside of the furnace is mounted on a clearance 8 between the furnace inner wall and the electrode inserted from the furnace inner wall.