Changing the release angle of the liquid by a simple operation. An elongated tubular sheath (2) to be inserted into the body is movably disposed in the longitudinal axis direction of the sheath (2) in an electrode member through which a high-frequency current is supplied (3), sheath (2) connected to the proximal end side, through the longitudinal axis direction are formed in the flow path (9) of the sheath (2) and a feeding means for feeding, to the distal end of the sheath (2), the electrode member 3 sliding hole for movably inserted and arranged and (6a), outlet for releasing liquid (C) which has been fed by the feeding means (9a) and is provided, sliding at the tip of the electrode member (3) (3b) which is larger than the hole 6a and extends in the radial direction outwardly in the radial direction is provided, and the discharge port (9a) is provided in front of the distal end portion (3b) in accordance with the distance from the distal end of the sheath (2) high frequency is formed in a shape and location to change the emission angle with respect to the longitudinal axis of the liquid (C) to be released To provide a (1).簡易な操作で液体の放出角度を変化させる。 体内に挿入される細長い筒状のシース(2)と、該シース(2)内に長手軸方向に移動可能に配置され、高周波電流が供給される電極部材(3)と、シース(2)の基端側に接続され、該シース(2)の長手軸方向に形成された流路(9)を介して送液する送液手段とを備え、シース(2)の先端に、電極部材3を移動可能に挿入配置させる摺動孔(6a)と、送液手段によって送液されてきた液体(C)を放出させる放出口(9a)とが設けられ、電極部材(3)の先端に摺動孔6aより大きく径方向外方に鍔状に延びる先端部(3b)が設けられ、放出口(9a)が、先端部(3b)のシース(2)の先端からの距離に応じて、前方に放出される液体(C)の長手軸に対する放出角度を変化させる形状および位置に形成されている高周波処置具(1)を提供する。
