A catheter (1) for tracheal or bronchial suction comprising a unit (3) for displaying the artificial airways, the trachea and the bronchial tree so as to allow the removal of secretions in particular, the catheter for tracheal or bronchial suction comprises optical fibres, a microcamera or another visualization technology positioned in the distal end (6). The operator can identify the position of the distal end (6), of the artificial airways, of the trachea and of the bronchial tree on the screen. Therefore it is possible to ensure that the tube of the catheter (5) is adjacent to or inside collections of fluid secretions or other material to be sucked up. The suction can be selectively applied to avoid damage to the mucosa and to facilitate the more complete elimination of secretions.