PROBLEM TO BE SOLVED: To provide a treatment tool to which an adhesive sheet can be easily attached, and that enables unfolding and applying the adhesive sheet to an affected part in a body with easy operation.SOLUTION: A treatment tool 10 used to unfold and apply an adhesive sheet S to an affected part P in a body, comprises: a handle operation part 20 at a base end side； and an operation unit 30 on which the adhesive sheet S is placed at a tip side thereof. The operation unit 30 includes: a head 31 for supporting the adhesive sheet S from inside； and a body 32 for supporting a peripheral part S2 around a part S1 which is supported by the head of the adhesive sheet S from inside. The body 32 includes a support member 40a and at least two flexible members 321A-321D. Each of the flexible members has a tip side supported to the head 31. By having the base end part supported to the head 31 by a slidably-configured movable cylinder 50, each of the flexible members expands outward as the movable cylinder 50 moves forward and projects at a peripheral area of the head.SELECTED DRAWING: Figure 8【課題】貼付シートの取り付けが容易であり、簡単な操作で貼付シートを体内で広げて患部に貼り付けることのできる処置具を提供する。【解決手段】処置具１０は、貼付シートＳを押し広げて体内の患部Ｐへ貼付するのに使用され、基端側にハンドル操作部２０と、先端側に貼付シートＳが被せられる作動部３０とを備え、作動部３０は、貼付シートＳを内側より支持する頭部３１と、貼付シートＳの頭部により支持される部分Ｓ１の周辺部分Ｓ２を内側より支持する胴部３２とからなり、胴部３２は支持部材４０ａと少なくとも２本の可撓性部材３２１Ａ～３２１Ｄとから構成され、各可撓性部材は先端側が頭部３１に支持され、基端部が頭部３１に対して進退可能な可動筒５０に支持されることにより、各可撓性部材が可動筒５０の前進に伴って外方へ膨らみかつ前記頭部の周囲に張り出す構成されている。【選択図】図８
