Abstract: An electrode roll for resistance welding comprising a fixed portion which has a disc portion at the longitudinal center part of a shaft where the disc portion and the shaft are at right angles to each other; a rotary portion which surrounds the fixed portion and has inner surfaces forming two side gaps facing the two side surfaces of the disc portion and a peripheral gap facing the peripheral surface of the disc portion, respectively; and a conductive liquid metal received in each of the gaps, where the peripheral gap is so narrow that the above conductive liquid metal may be pulled up along the gap to fill the same when the above rotary portion rotates, and the side gaps are substantially wider than the peripheral gap.