PROBLEM TO BE SOLVED: To provide a treatment tool, a manipulator, and a surgery support system, which can detect the amount of displacement with a high precision.SOLUTION: The treatment tool of which a treatment unit 40 operates with a driving force generated from a driving source 21 includes: a rod 22 and a driving wire 23 that connected to the driving source 21 a connecting portion 42 that is formed in the treatment unit 40, that is connected to the driving wire 23, that is transmitted with the driving force from the driving source 21 via rod 22 and a driving wire 23, and that converts the driving force into movement of the treatment unit 40 and a sensing wire 26 that is moved by the connecting portion 42.COPYRIGHT: (C)2013,JPO&INPIT【課題】変位量を精度よく検出することができる処置具、マニピュレータ及び手術支援システムを提供すること。【解決手段】駆動源21が発する駆動力により処置部40が作動する処置具であって、駆動源21に連結されたロッド22及び駆動ワイヤ23と、処置部40に設けられ、駆動ワイヤ23が接続され、駆動源21からロッド22及び駆動ワイヤ23を介して駆動力が伝達され該駆動力を処置部40の動作に変換する連結部42と、連結部42により移動されるセンシング用ワイヤ26と、を備える。【選択図】図3