PROBLEM TO BE SOLVED: To shield a driving force supply part disposed in a surgical instrument support part from a surgical instrument part without bringing the driving force supply part into contact with a surgical instrument part by a shielding member in an operation support device, to easily assemble the operation support device, and to easily attach/detach the surgical instrument part.SOLUTION: The operation support device 100 includes a surgical instrument unit 1 and the surgical instrument support part 101. The operation support device 100 further includes a sterilizable intermediate member 2 rotatably connected to the surgical instrument support part 101 for detachably holding the surgical instrument unit 1 a sterilizable drape assembly 8 having holes 7C and 7D and a surgical instrument driving part 3 for feeding a driving force to the surgical instrument unit 1 via the intermediate member 2. An unclean area Au and a clean area Ac are formed with an assembly constituted by the drape assembly 8 and the intermediate member 2 as a boundary. The intermediate member 2 is detachably connected to the surgical instrument support part 101 on the side of the unclean area Au, and the surgical instrument unit 1 is detachably held on the side of the clean area Ac. The surgical instrument driving part 3 and the surgical instrument support part 101 are disposed on the unclean area Au.COPYRIGHT: (C)2013,JPO&INPIT【課題】手術支援装置において、術具部支持部に設けた駆動力供給部を術具部に接触させることなく遮蔽部材によって術具部から遮蔽し、しかも装置の組立と術具部の着脱とを容易に行うことができるようにする。【解決手段】処置具ユニット1と術具部支持部101とを有する手術支援装置100であって、術具支持部101に回転可能に連結され処置具ユニット1を着脱可能に保持する滅菌可能な中間部材2と、孔部7C、7Dを有する滅菌可能なドレープ組立体8と、中間部材2を介して処置具ユニット1に駆動力を供給する術具駆動部3と、を備え、ドレープ組立体8と中間部材2とからなる組立体を境界として不潔域AUと清潔域ACとが形成され、中間部材2は、不潔域AUの側で術具支持部101と着脱可能に連結され、清潔域ACの側で処置具ユニット1を着脱可能に保持し、術具駆動部3および術具支持部101は、不潔域AUに配置されている。【選択図】図1