A generally cylindrical aerosol generator which can be used as a substitute for a conventional cigarette has a longitudinal extending horn member (8) that carries a piezoelectric actuator (9) mounted within a main housing (4) and a mouthpiece housing (5). A cartridge (7) contains an aerosolizable liquid (28) in a chamber having an inner chamber wall (13) extending longitudinally between the proximal and distal ends (15, 16) of the cartridge, defining a receptacle to receive the horn member (8) from the distal end, a longitudinally extending outer chamber wall (17) surrounding the inner wall, a proximal inner end wall (18) bridging the inner chamber wall at the proximal end, and a proximal outer end wall (19) longitudinally spaced from the inner wall to define a discharge region (20). A nozzle (23) discharges liquid from the discharge region through the outer end wall as an aerosol (39). A capillary driver wall (24) is disposed between the inner and outer chamber walls, spaced from the inner wall to define a longitudinally extending capillary passageway (25) sufficiently narrow to drive liquid within the chamber by capillary action along the gap to the discharge region, where it is aerosolised by the vibratory action of the piezo device that is transmitted along the horn (8) to the discharge region (20).Linvention concerne un générateur daérosol de forme générale cylindrique qui peut être utilisé comme produit de substitution pour une cigarette classique comportant un élément à cornet (8) sétendant longitudinalement qui comporte un actionneur piézoélectrique (9) monté dans un logement principal (4) et un logement embout (5). Une cartouche (7) contient un liquide aérosolisable (28) dans une chambre comportant une paroi intérieure de chambre (13) sétendant longitudinalement entre les extrémités proximale et distale (15, 16) de la cartouche, définissant un réceptacle pour recevoir lélément en cornet (8) par lextrémité distale, une paroi extérieure de chambre (17) sétend
