Device for dispensing a fluid product, having a dispensing head (1) provided with a dispensing orifice (10), an air vent (20) for generating a flow of air upon actuation of the device, and a reservoir (30) containing a single dose of product, said reservoir (30) having a proximal axial end and a distal axial end and being mounted removably in said dispensing head (1) in such a way that, after the actuation of the device, the empty reservoir can be withdrawn from said device and replaced with a new, full reservoir, said air vent (20) being adapted to return to a rest position in order to permit renewed actuation with said new, full reservoir, said dispensing head (1) having a proximal piercing point (11) adapted to pierce said proximal axial end of said reservoir (30), and said device having a movable piercing member (40) arranged to slide axially around said dispensing head (1) between a loading position and an actuating position, said movable piercing member (40) having a distal piercing point (41) adapted to pierce the distal axial end of said reservoir (30) when said movable piercing member (40) is moved to its actuating position.
