Nasal dilator device applicable to the outer surface of the nasal wall to increase the flow cross section of the air inhaled during breathing, characterized in that it comprises a shaped flattened body (2, 30) adapted to engage the columella (C) and adhesive fastening means (10, 24a, 24b), connected to the flattened body to adhere to regions of the nasal wall on opposite sides of the nasal bridge (PN) so as to exert a lifting action on the nasal tip by means of said flattened body.
