The present invention relates to an aerosol-therapy device (19), comprising a casing (10), a compressor group (20) mounted in the casing and air intake (40) and delivery (42) means respectively to and from said compressor group. The compressor group comprises a motor (22) and a compressor device (24) which can be driven by the motor to draw in and deliver air respectively through the air delivery and intake means. In addition, the compressor device comprises a piston (50) attached and supported solely by the casing and a cylinder (60) sliding on the piston and eccentrically connected to a drive shaft (30) of the motor.
