Disclosed is a suction device. The suction device includes a sensor unit configured to measure breathing condition of a patient, a tube unit configured to move into a bronchus of the patient so as to suck foreign material generated in the bronchus of the patient when a measured value measured by the sensor unit exceeds a predetermined reference value, and a control unit configured to control an operation of the tube unit based on the measured value measured by the sensor unit. According to the present invention, there is provided the suction device which is automatically operated by directly determining whether foreign material is generated in the bronchus of the patient.
