Abstract: To provide a cavitation processing device that provides proper cavitation effect for an appropriate processing position. The cavitation processing apparatus includes a nozzle configured to eject cavitation fluid; a direction changing member configured to change a flow direction of the cavitation fluid, the direction changing member having groove for guiding the flow direction of the cavitation fluid, the groove configured to suppress cavitation bubbles contained in the cavitation fluid from dispersing; and a workpiece fixing member on which a workpiece is arranged.

Abstract: Provided is a cavitation processing apparatus for providing cavitation effects such as residual stress evenly on the surface and inner part of the component. The cavitation processing appratus includes: a nozzle that ejects cavitation fluid to a workpiece; a direction changing member that changes a flow direction of the cavitation fluid that collided with the workpiece to be branched toward inside; a driving apparatus including a rotary shaft, the driving apparatus that rotates the workpiece together with the rotary shaft; and a support member supporting one end of the rotary shaft.