Disclosed is a suctioning device. The present invention comprises: a sensor portion for measuring the state of breathing of a patient； a tube portion which is moved into the bronchial tube of the patient to aspirate impurities produced in the bronchial tube of the patient, when a measurement value measured by the sensor portion exceeds a specific reference value； and a control portion for controlling the driving of the tube portion on the basis of the measurement value measured by the sensor portion. According to the present invention, provided is the suctioning device which is automatically driven by directly determining whether impurities have been produced inside the bronchial tube of the patient.
