Problem to be solved: to provide a technique for efficiently and efficiently performing surface treatment of an object.Solution: a rotary type fluid jet tube 11 capable of receiving a supply of an injection fluid comprising any of a dry gas, a humid gas, a steam, a mist or a liquid from a fluid supply system 18 or injecting the injection fluid supplied toward the surface treatment object W, and a rotary type fluid jet tube 11 capable of rotating in the forward and reverse direction A transmission part 21 for transmitting the rotational power from the rotation drive system 41 to the fluid jet tube 11 is provided.A fluid inflow portion (introduction port 12) for flowing the injection fluid from the fluid supply system 18 is formed in a portion other than the leading end portion of the fluid injection pipe 11, and a plurality of nozzles 13 for ejecting the inflow fluid are branched in the leading end portion of the fluid jet pipe 11.The transmission part 21 is attached to the outer periphery of the fluid jet tube 11.Diagram
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