Abstract: The invention relates to a cannula (5) for a laryngotracheal anesthesia device (1) comprising a semi-rigid elongate tube (6) including a proximal end (14), to be connected to a syringe (2) containing the anesthetic liquid, and a distal end (15), to be inserted into the cavity of the larynx up until it is inside the trachea of a patient, a plurality of anesthetic liquid outlets (16) being provided, from the distal end (15), on a predetermined area of the length of said tube (6). According to the invention, said tube (6) is inwardly curved over the entire length thereof between said proximal end (14) and said distal end (15), and said tube (6) is open at the distal end (15) thereof and makes it possible to receive an assembly forming a flexible tip (9) comprising an axial outlet (33) for liquid anesthetic.