The present invention relates to a sealing device for heating the heat transfer water tube is provided on the wire inlet direction of the heating hot water tube end side, prevent swelling or leakage and leakage caused by an external temperature difference between the heating medium and prevent damage to the heating wire bonding structure are for the sealing device of the heating hot water pipe for causing, electric hot water heating type sealing the both ends of hot water pipes of the heating device, and to cope with even deformation of the hot water pipe due to temperature changes to prevent leakage and leakage phenomenon, and also external It is to prevent the problems of poor hot water pipe damage and electrical bond in accordance with the temperature difference in advance, provide a sealing device for heating the hot water heat transfer pipe that is easy injection and discharge of the heating medium is filled inside the hot water pipe.