Aerosol therapy device (1), comprising a housing (10), a compressor group (20), mounted within said housing, an air intake means (40) and an air expulsion means (42) respectively to and from said compressor group (20), wherein said compressor group comprises a motor (22) and a compressor device (24) that can be activated by said motor (22) by means of a connecting rod-crankshaft connection mechanism for sucking and expelling air respectively through said means of admission (40) and expulsion (42) of air, characterized in that: - said compressor device comprises a piston (50) that is fixed, being connected to said housing (10) , and a cylinder (60) that slides along said piston (50) and that is eccentrically connected to a motor drive shaft (22), - the compressor group (20) comprises a cooling fan (100) installed on the shaft motor (30) of the motor, and - said cooling fan (100) is installed on the end of the drive shaft (20) that projects from the engine on the side facing the cylinder (60) and is eccentrically connected to the cylinder (60).Dispositivo de terapia por aerosol (1), que comprende una carcasa (10), un grupo compresor (20), montado dentro de dicha carcasa, un medio de admisión de aire (40) y un medio de expulsión de aire (42) respectivamente hacia y desde dicho grupo compresor (20), en el que dicho grupo compresor comprende un motor (22) y un dispositivo compresor (24) que puede ser activado por dicho motor (22) por medio de un mecanismo de conexión de biela - cigüeñal para aspirar y expulsar aire respectivamente a través de dichos medios de admisión (40) y de expulsión (42) de aire, caracterizado porque: - dicho dispositivo compresor comprende un pistón (50) que está fijo, estando unido a dicha carcasa (10), y un cilindro (60) que se desliza por dicho pistón (50) y que está excéntricamente conectado a un eje motor del motor (22), - el grupo compresor (20) comprende un ventilador de refrigeración (100) instalado sobre el eje motor (30) del motor, y - di
