Ventilation device for a cooling module for a motor vehicle, comprising: - at least one tangential-flow turbomachine (28-1; 28-2) comprising a bladed wheel (32-1; 32-2) and a motor (33-1; 33-2) for driving the rotation of the bladed wheel (32-1; 32-2), - at least one frame forming a receiving housing (30-1; 30-2) able to accommodate the bladed wheel (32-1; 32-2), - a plurality of shutters (52-1; 52-2) mounted with the ability to pivot with respect to the frame, the plurality of shutters (52-1; 52-2) being designed to selectively block off an opening (51-1; 51-2) through the frame, and - an actuator (54-1; 54-2) to bring about the pivoting of the plurality of shutters (52-1; 52-2), characterized in that; said actuator (54-1; 54-2) comprising: - an electric motor (56-1; 56-2) of which the output shaft drives the rotation of one of the plurality of shutters (52-1; 52-2); - at least one connecting rod connecting said one shutter (52-1; 52-2) to the other shutter(s) (52-1; 52-2) of the plurality of shutters (52-1; 52-2), so that the rotation of said one shutter (52-1; 52-2) is transmitted to the other shutter(s) (52-1; 52-2), and in that, in the position in which the opening (51-1; 51-2) is blocked off by the shutters (52-1; 52-2), the shutters (52-1; 52-2) form a substantially planar surface which, with an air inlet surface normal to the air flow entering the ventilation device, forms an angle (α) of between 5 and 20°, preferably substantially equal to 12.5°. - at least one tangential-flow turbomachine (28-1; 28-2) comprising a bladed wheel (32-1; 32-2) and a motor (33-1; 33-2) for driving the rotation of the bladed wheel (32-1; 32-2), - at least one frame forming a receiving housing (30-1; 30-2) able to accommodate the bladed wheel (32-1; 32-2), - a plurality of shutters (52-1; 52-2) mounted with the ability to pivot with respect to the frame, the plurality of shutters (52-1; 52-2) being designed to selectively block off an opening (51-1; 51-2) through the frame, and - an actuator (54-1; 54-2) to bring about the pivoting of the plurality of shutters (52-1; 52-2), characterized in that; said actuator (54-1; 54-2) comprising: - an electric motor (56-1; 56-2) of which the output shaft drives the rotation of one of the plurality of shutters (52-1; 52-2); - at least one connecting rod connecting said one shutter (52-1; 52-2) to the other shutter(s) (52-1; 52-2) of the plurality of shutters (52-1; 52-2), so that the rotation of said one shutter (52-1; 52-2) is transmitted to the other shutter(s) (52-1; 52-2), - an electric motor (56-1; 56-2) of which the output shaft drives the rotation of one of the plurality of shutters (52-1; 52-2); - at least one connecting rod connecting said one shutter (52-1; 52-2) to the other shutter(s) (52-1; 52-2) of the plurality of shutters (52-1; 52-2), so that the rotation of said one shutter (52-1; 52-2) is transmitted to the other shutter(s) (52-1; 52-2), and in that, in the position in which the opening (51-1; 51-2) is blocked off by the shutters (52-1; 52-2), the shutters (52-1; 52-2) form a substantially planar surface which, with an air inlet surface normal to the air flow entering the ventilation device, forms an angle (α) of between 5 and 20°, preferably substantially equal to 12.5°.