Device (1; 101; 201) for selective ventilation of one or both lungs (LL, LR) of a patient (P), comprising: - an endotracheal tube (2; 102; 202) to be arranged in the trachea ( T) of the patient (P) and having a proximal end (3) and a distal end (4; 104; 204), - an endobronchial tube (5; 105; 205) connected to the endotracheal tube (2; 102; 202) and having a proximal end (6; 106; 206) and a distal end (7; 107; 207), the endobronchial tube (5; 105; 205) being received in the endotracheal tube (2; 102; 202) and extending the distal end (7; 107; 207) of the endobronchial tube (5; 105; 205) beyond the distal end (4; 104; 204) of the endotracheal tube (2; 102; 202), and - means (21) for tactile positioning of the distal end (7; 107; 207) of the endobronchial tube (5; 105; 205) in at least the longitudinal direction of the trachea (T), the positioning means (21) being adapted to also position the distal end (7; 107; 207) of the tu endobronchial bo (5; 105; 205) in the peripheral direction of the trachea (T), characterized by means (27) for fixing the endobronchial tube (5; 105; 205) with respect to the endotracheal tube (2; 102; 202).Dispositivo (1; 101; 201) para la ventilación selectiva de uno o ambos pulmones (LL, LR) de un paciente (P), que comprende: - un tubo endotraqueal (2; 102; 202) para ser dispuesto en la tráquea (T) del paciente (P) y que tiene un extremo proximal (3) y un extremo distal (4; 104; 204), - un tubo endobronquial (5; 105; 205) conectado al tubo endotraqueal (2; 102; 202) y que tiene un extremo proximal (6; 106; 206) y un extremo distal (7; 107; 207), siendo recibido el tubo endobronquial (5; 105; 205) en el tubo endotraqueal (2; 102; 202) y extendiéndose el extremo distal (7; 107; 207) del tubo endobronquial (5; 105; 205) más allá del extremo distal (4; 104; 204) del tubo endotraqueal (2; 102; 202), y - unos medios (21) para posicionar por tacto el extremo distal (7; 107; 207) del tubo endobronquial (5; 105; 205) en al menos la dirección longitudin