A ventilation catheter. The ventilation catheter comprises a hollow catheter body (1) a part of the catheter body (1) is located in the trachea (0), and the other part thereof is located outside the trachea (0) a hollow (10) of the catheter body (1) has two openings, i.e., an extratracheal opening (101) and an endotracheal opening (102) a flexible, film-like, expandable bag (2) is provided on one side of the endotracheal opening (102) a part of the bag (2) does not change along with expansion of the bag (2) to form at least one recessed part (211) in a bag area (21) the recessed part (211) in the bag area (21) is open towards the extratracheal opening (101) side of the ventilation catheter and is closed towards the endotracheal opening (102) side of the ventilation catheter, so that a secretion (3) on the bag (2) can enter the recessed part (211) in the bag area (21) when the ventilation catheter is in use an endotracheal opening (42) of a suction catheter (4) for the secretion (3) on the bag (2) is located in the recessed part (211) in the bag area (21). Since the opening of the suction catheter for the secretion (3) on the bag (2) is located in the bag area (21), the secretion (3) on the bag (2) can be sucked out thoroughly, thereby reducing the risk of pulmonary infection caused by falling of the secretion to the greatest extent.Linvention concerne un cathéter de ventilation. Le cathéter de ventilation comprend un corps de cathéter (1) creux une partie du corps de cathéter (1) est située dans la trachée (0), et lautre partie de celui-ci est située à lextérieur de la trachée (0) un creux (10) du corps de cathéter (1) ayant deux ouvertures, à savoir, une ouverture extra-trachéale (101) et une ouverture endotrachéale (102) un sac (2) expansible souple de type film est disposé sur un côté de louverture endotrachéale (102) une partie du sac (2) ne change pas avec lexpansion du sac (2) pour former au moins une partie évidée (211) dans une zone de sac (21) la partie évi
