PROBLEM TO BE SOLVED: To provide a glass conduit which can relax the concentration of electric power. SOLUTION: The glass conduit 1 is provided with: a conduit body 2; flanges 3 provided at both the edges of the conduit body 2; and electrodes 4 pulled out from the flanges 3, respectively. Each flange 3 comprises: an inner ring part 31 connected with the conduit body 2; and an outer ring part 32 surrounding the inner ring 31 and connected with each electrode 4. The inner ring 31 is composed of a material having electric resistance higher than that of the outer ring part 32, and the center C 2 of the inner ring part 31 is lies near the side of the electrode 4 from the center C 1 of the conduit body 2. COPYRIGHT: (C)2010,JPO&INPIT