Provided is an electronic cigarette liquid replenishing tool which is capable of making it unnecessary to exchange a cartridge provided with a liquid containing portion, preventing an occurrence of a new environmental problem and a waste of resources, and reducing a financial burden of a consumer. The electronic cigarette liquid replenishing tool is provided with a casing, an absorber, a piston, and an injection tube. The casing has a front end portion, which is opened and functions as a connection portion slidably fitted onto a mouthpiece portion of an electronic cigarette, and has a rear end portion, which is closed. The absorber is provided in the casing, a liquid containing a flavor ingredient is freely impregnated into the absorber, and the transudation of the liquid is freely transuded by pressure from the absorber. The piston has a through hole and is slidably provided in the casing to press the absorber. The injection tube is provided to the piston with an internal space serving as a flow path of the liquid transuded from the absorber communicated with the through hole, and is inserted in the cartridge via a suction hole when the connection portion of the casing is fitted onto the mouthpiece portion of the cartridge of the electronic cigarette.Linvention porte sur un outil de remplissage en liquide de cigarette électronique, lequel outil est apte à rendre inutile déchanger une cartouche comportant une partie contenant un liquide, à empêcher lapparition dun nouveau problème environnemental et un gaspillage de ressources, et à réduire une charge financière dun consommateur. Loutil de remplissage en liquide de cigarette électronique comporte un boîtier, un absorbeur, un piston et un tube dinjection. Le boîtier a une partie dextrémité avant, qui est ouverte et qui fonctionne en tant que partie de liaison adaptée de manière coulissante sur une partie dembout dune cigarette électronique, et a une partie dextrémité arrière qui est fermée. Labsorbeur est disposé dan
