A microfluidic dispenser device of inhalable substances includes a casing (2), housed in which are a driving circuit (3) and a microfluidic cartridge (5) having a tank (17) that contains a liquid (L) to be delivered. The microfluidic cartridge (5) is provided with at least one nebuliser (18) controlled by the driving device (3). The nebuliser (18) includes: a substrate (20)； a plurality of chambers (30) formed on the substrate (20) and fluidically coupled to the tank (17) for receiving the liquid (L) to be delivered； and a plurality of heaters (33), which are formed on the substrate (20) in positions corresponding to respective chambers (30), are thermally coupled to the respective chambers (30) and are separated from the respective chambers (30) by an insulating layer (21), and are controlled by the driving device (3). Each chamber (30) is fluidically connected with the outside by at least one respective nozzle (32) .
