To provide a high speed rotation device capable of stably supporting a high speed rotary shaft without temperature rise and vibration by maintaining lubricating performance.

The rotary shaft 2 integrated with impellers 3, 4 is supported by rolling bearings 5, 6 and is covered by a housing 7. Lubricating oil 20 is stored to have a liquid level 20a in the housing 7. An ultrasonic wave generating device 30 includes an ultrasonic wave oscillator 30a generating ultrasonic wave in lubricating oil 20 to discharge micro particles of lubricating oil 20 from the liquid level 20a.