The present invention provides a device (1) for assisting a cough comprising a hosing (3) a chamber (5) formed in the housing a mouthpiece (7) communicating with the chamber and exposed out of the housing and an electromagnetic valve (9) assembly for opening or closing the chamber at a pre set frequency. The device for assisting a cough according to the present invention may produce a high cough pressure and thus form a strong cough airflow to loose and cough the lung mucus out of the airways and may prevent the collapse of the patient s airway caused by the rapid release of the cough pressure.
