The invention relates to an aerosol therapy device (1), comprising a casing (10), a compressor group (20) mounted in the casing, an air intake (40) and a delivery means (42) respectively to and from said compressor group. The compressor group comprises an electric motor (22) and a compressor device (24) which can be driven by the motor by means of a slot-crank mechanism to draw in and deliver air respectively through the air delivery and intake means. The device also comprises a fan (100) for cooling the compressor group (20) that is mounted on a drive shaft (30) of the electric motor. The fan (100) is fitted on the end of the drive shaft (30) projecting from the electric motor on the side facing the compressor device (24) and is eccentrically connected to the compressor device (24).
