Abstract: The present invention provides a high-frequency oscillation (HFO) artificial respiration apparatus comprising an inhale gas introduction block 62 for supplying an inhale gas to a patient X, a patient-side path 60 for guiding the inhale gas to the patient X, an oscillating air pressure urging block 50 for applying an oscillating air pressure to the inhale gas, an exhaust path 70 for exhausting an exhale gas exhaled from the patient X, and a controller 40 for controlling operation of the oscillating air pressure urging block 50. The oscillating air pressure urging block 50 includes a blower 52 and a rotary valve 54. The controller 40 includes an input block 41 for accepting a ventilation frequency and a ventilation amount at a time for the patient and an operation control block 49 for controlling the rotary valve 54 and the blower 52 according to values entered.