A converter device for a laryngoscope intended to be linked to a blade (6) of a laryngoscope, having a straight section (7) and a curved section (8), along with a light source (14) typical of the laryngoscope, for providing it with an additional viewing system in tracheal intubation procedures. The device comprises a central body (1) of tubular section with a through hole (2) for housing an imaging system (3), an upper wing (4) which can be coupled to the curved section (8) of the blade (6), provided with an elastic adjustment portion (11) for adapting to the curved section (8) of the blade (6), and a fastening portion (12) for preventing lateral movement and movement of the device, and a lower wing (5) which can be coupled on the straight section (7) of the blade (6) with an elastic fastening section (13) for adapting to the edge of said straight section (7).