Device for placing a tracheal cannula in a tracheostoma, with an auxiliary insertion element that has a rod (6, 6 ', 14) that can be passed through the tracheal cannula and a conical tip (2, 13) attached with the rod, which in a first state with a small base diameter and a second state with a large base diameter can be placed and removed, the auxiliary insertion element having a section (6 ', 14) adjacent to the conical tip ( 2) whose diameter corresponds at most to the inside diameter of a tracheal cannula (1) that is introduced with the auxiliary insertion element and where the small base diameter of the conical tip is also at most equal to the inside diameter of the tracheal cannula , while the large base diameter of the conical tip is larger than the inner diameter of the tracheal cannula and preferably corresponds approximately to the outer diameter of the tracheal cannula to be colled Ocar, the conical tip of an inner core (11, 11 ') and an outer sheath (13, 13') being composed, where sheath (13) and core (11) are joined together in the vicinity of the leading end of the conical tip, and where the outer sheath has a radial thickness at the base of the conical tip that corresponds approximately to the wall thickness of the tracheal cannula at its front end, and having the core (11, 11 ') in the area from the base a maximum diameter that is smaller or equal to the inner diameter of the tracheal cannula (1), and where the core (11, 11 ') is connected with a flexible rod or traction element (14, 14 ') that can be passed through the tracheal cannula, where the application of a traction on the draft element in the opposite direction to the direction previously marked by the conical tip causes the sheath that was resting on the front end of the tracheal cannula is turned upside down from its heel ia the core, and due to its previous elastic tension it shrinks until its outer diameter is equal to or smaller than the inner diameter of the tracheal cannula, whereby the
