PROBLEM TO BE SOLVED: To enable efficient repair by easy assembly and replacement by every driving system in a surgical instrument remotely operated by the driving system.SOLUTION: The surgical instrument 1 includes a driven part 5 and a driving part for remotely operating movements of the driven part 5. The driven part 5 is configured by detachably coupling a treatment instrument part 2A, a first joint part 3A, and a second joint part 4A. The surgical instrument is equipped with drive force transmitting parts 2B, 3B, 4B having distal end sides which are respectively connected to forceps of the treatment instrument part 2A, an annular driven body of the first joint part 3A, and an annular driven body of the second joint part 4A and drive force supplying part 2C, 3C, 4C which are connected to proximal end sides of the drive force transmitting parts 2B, 3B, 4B. A positioning coupling part is provided on the treatment instrument part 2A, the first joint part 3A, and the second joint part 4A, and an attachment and detachment opening part is provided on the first joint part 3A and the second joint part 4A.COPYRIGHT: (C)2011,JPO&INPIT【課題】駆動系によって遠隔操作される外科器具において、駆動系単位で容易に組立、交換を行うことができ、効率的に修理を行うことができるようにする。【解決手段】被駆動部5と、被駆動部5の動作を遠隔操作する駆動部とを有する外科器具1であって、被駆動部5は、処置器具部2A、第1関節部3A、および第2関節部4Aが着脱可能に連結されてなり、処置器具部2Aの鉗子、第1関節部3Aの環状被駆動体、第2関節部4Aの環状被駆動体に先端側がそれぞれ接続された駆動力伝達部2B、3B、4Bと、駆動力伝達部2B、3B、4Bの基端側に接続された駆動力供給部2C、3C、4Cとを備え、処置器具部2A、第1関節部3A、および第2関節部4Aには、位置決め連結部が、第1関節部3A、および第2関節部4Aには、着脱開口部が設けられた構成とする。【選択図】図1
