The invention relates to a device (1) for dispensing an air-dischargeable substance, comprising an air inlet (3), a discharge nozzle (2) for the air loaded with the substance, an outflow region (4) in which a chamber (5) which comprises the substance to be discharged can be positioned, a first air guide duct (6) that leads from said outflow region to the discharge nozzle, and a second air guide duct (7) that leads from the air inlet to the outflow region and that is fluidically connected, via a connection channel (8), to the first air guide duct, and there being an inflow direction (R) of air flowing through an inflow opening (9) through the connection channel and into the first air guide duct, which direction is oriented perpendicularly to a direction of flow (S) of the air loaded with the substance into the first air guide duct in the region of the inflow opening. A separating wall (10) is designed in the outflow region between the first and the second air guide ducts, and said separating wall consists of a hard material. A free end face (11) of said separating wall, which faces the chamber, is additionally provided with a soft material. The chamber comprises a foil cover in an overlap with a chamber cavity (12) that contains the substance, and the separating wall lies against this foil cover forming a seal by means of said soft material. Said chamber receiving portion is formed in a first housing part, and a second housing part (16) is provided which is pivotally connected to the first housing part. The air guide duct is subdivided along one portion of its length, with subregions (T1, T2, T3, T4) formed on the first and the second housing parts. The chamber comprises a pierceable chamber covering (13). The device also comprises a piercing device (E) for forming a piercing opening in the chamber arrangement. The separating wall is designed to divert air into the chamber, and said piercing device additionally comprises two piercing projections (17) one of which is
