With the invention, a gastric tube with an inflatable stopper and a supply cannula that can be introduced into the oesophagus and on which a lumen is superposed in the region of the inflatable stopper, which is connected to the interior of the inflatable stopper and permits a rapid volume equalization between different regions of the inflatable stopper, is to be improved in that the lumen which is located between the supply cannula and the inflatable stopper and connected to the interior of the inflatable stopper, can be produced in a technically simple manner and at the same time provides sufficient volume equalization between partial volumes of the inflatable stopper. This object is achieved by a gastric tube with an inflatable stopper in which a separate molding body is mounted on the supply cannula which determines the shape of the lumen.