A device for inserting a tracheal tube into a tracheostomy has as insertion aid with a shaft (6, 6&prime；, 14) which can be inserted through the tracheal tube, and a conical tip (2, 13) which is or can be joined to the tracheal tube. In order to provide a device for inserting a tracheal tube which considerably reduces the risk of injury when inserting the tracheal tube, which makes the insertion process easier, the inserted tube being highly comfortable even with a long-term use, keeping low the danger of injuries or sore points in the trachea, the insertion aid according to the invention has a conical tip (2, 13) which can have a small base diameter in a first state and a large base diameter in a second state. The insertion aid includes a section (6&prime；, 14) adjacent to the conical tip (2) whose diameter corresponds at the most to the inner diameter of a tracheal tube (1) to be inserted by means of the insertion aid, the small base diameter of the conical tip also being at the most equal to the inner diameter of the tracheal tube, while the large base diameter of the conical tip is larger than the inner diameter of the tracheal tube and preferably corresponds to approximately the outer diameter of the tracheal tube to be inserted with the insertion aid.
