PROBLEM TO BE SOLVED: To provide a treatment device for electrosugery that can easily incise a body tissue.SOLUTION: The treatment device for electrosugery includes a sheath (11) that has a distal end portion (11a) and a proximal end portion (11b) a needle-like electrode portion (50) that has a distal end and a proximal end, is inserted into the sheath such that a direction toward the distal end from the proximal end becomes a direction toward the distal end from the proximal end, and treats a target site at the distal end a first electrode (51) that is provided to the distal end of the needle-like electrode portion and exposed to the outside a second electrode (52) of which the relative positional relationship with respect to the first electrode is fixed at a position separated from the first electrode toward the proximal end an insulator (53) that insulates the first electrode from the second electrode by being interposed between the first and second electrodes a first conductive portion that applies a high-frequency current to the first electrode and a second conductive portion that applies a high-frequency current to the second electrode.COPYRIGHT: (C)2012,JPO&INPIT【課題】生体組織の切開を容易に行うことができる電気手術用処置器具を提供すること。【解決手段】遠位端部(11a)と近位端部(11b)とを有するシース(11)と、先端と基端とを有し、前記基端から前記先端に向かう方向が近位端部から遠位端部に向かう方向となるようにシースに挿入され、前記先端において対象部位に対して処置を行う針状電極部(50)と、針状電極部の前記先端に設けられて外部に露出された第一電極(51)と、第一電極よりも前記基端側に離間した位置に第一電極との相対位置関係が固定されて配置された第二電極(52)と、第一電極と第二電極との間に介在されて第一電極と第二電極とを絶縁する絶縁体(53)と、第一電極に高周波電流を通電させる第一導電部と、第二電極に高周波電流を通電させると第二導電部と、を備える。【選択図】図1
