An ultrasound operation apparatus includes an ultrasound transducer a drive section that drives the ultrasound transducer using a drive signal a probe that has a proximal end section in which the ultrasound transducer is provided and a distal end section to which ultrasound vibrations are transmitted, and that performs treatment for living tissue by using ultrasound vibrations at the distal end section a resonance frequency tracking section that drives so as to cause ultrasound vibrations to be generated at a resonance frequency a detection section that detects a frequency component signal of a frequency component other than a resonance frequency of the drive signal and a cavitation suppression control section that controls so as to suppress or eliminate cavitations according to the detection result.
