PROBLEM TO BE SOLVED: To provide a forceps device which can also be suitably used as a high frequency hemostatic forceps when a high-frequency current is supplied from the outside.SOLUTION: A forceps device comprises: an elongated barrel part； a pair of gripping pieces 12 which is arranged at the distal end of the barrel part, at least one of which is electrically conductive, and which is relatively openable/closable； a power output part 13a which is arranged at the proximal end of the barrel part and outputs power； a power conversion mechanism 14 for connecting the pair of gripping pieces 12 and the power output part 13a and converting the power output by the power output part 13a into a relative open/close operation of the pair of gripping pieces 12； and an insulating member 15 which is arranged on a path connecting the pair of gripping pieces 12 and the power output part 13a via the power conversion mechanism 14 and electrically insulates the pair of gripping pieces 12 and the power output part 13a.【課題】外部からの高周波電流の供給によって高周波止血鉗子としても好適に使用することができる。【解決手段】細長い胴部と、該胴部の先端に設けられ、少なくとも一方が導電性を有し、相対的に開閉可能な一対の把持片１２と、胴部の基端に設けられ、動力を出力する動力出力部１３ａと、一対の把持片１２と動力出力部１３ａとを接続し、該動力出力部１３ａが出力する動力を一対の把持片１２の相対的な開閉動作に変換する動力変換機構１４と、該動力変換機構１４を介して一対の把持片１２と動力出力部１３ａとを接続する経路上に設けられ、一対の把持片１２と動力出力部１３ａとを電気的に絶縁する絶縁部材１５とを備える鉗子装置を提供する。【選択図】図２
