The present invention without electrode material is dissolved, pollution of liquid does not occur, it is to provide a heat generator of safe electric hot-water bottle. A carbon or titanium insoluble in an aqueous solution containing an electrolyte to an AC terminal is connected to the rod electrode 7, 8 of a primary material, further supporting means for holding a constant interval so that these electrodes with each other do not contact It was fixed at 9. .BACKGROUND【課題】電極材料が溶解せず、液体の汚濁も発生しない、安全な電気式湯たんぽの発熱装置を提供する。【解決手段】交流端子に電解質を含む水溶液に不溶のカーボンやチタンを主材料とする棒状電極7、8を接続し、さらにこれら電極同士が接触しないように一定の間隔を保持するための支持具9に固定した。【選択図】図1