Provided is a treatment tool that has both operations of grasping, excision, and exfoliation of a target tissue, and can reduce the burden on an operator without exchanging left and right devices and adjusting the field of view of an endoscope. A high-frequency forceps configured to freely open and close a pair of forceps pieces including a cut-out portion for supplying a high-frequency current to a living tissue via a pivot, the cut-out portions being formed on the opposing surfaces of the pair of forceps pieces, The incisions are formed to be spaced apart from each other with the pair of forceps pieces being closed while being formed to extend from the pivot side to the tip side.対象組織の把持や切除及び剥離という両方の操作を兼ね備え、左右のデバイスの入れ替えや内視鏡の視野の調整を行うことなく、術者への負担を軽減できる処置具を提供する。 生体組織に高周波電流を通電する切開部を備える一対の鉗子片を枢軸を介して開閉自在に構成した高周波鉗子であって、前記切開部は、前記一対の鉗子片のそれぞれ対向する面に、前記枢軸側から先端側へ延びるように形成されると共に、前記一対の鉗子片を閉じた状態で前記切開部が互いに離間して形成される。
