Abstract: The present invention relates to a tracheal ventilating device, especially a tracheal tube or tracheal cannula which obturates the trachea as hermetically as possible for ventilating a patient, the device comprising a cuffed balloon which blocks the trachea below the glottis and through which a ventilating cannula is passed, with the cuffed balloon when filled or inflated and freely unfolded without any limitation, being larger than when placed in the trachea in an inflated state, and being made from a soft flexible foil material. To intubate a patient with said device as gently as possible at low pressures over a long period of time and with a low risk of infection, the invention suggests that the draped fold of the cuffed balloon should rest on the trachea and be designed in such a way that the loop created at the dead end of a fold has a small diameter which inhibits the free flow of secretion through the loop of said fold.