Treatment tool

The invention provides a treatment tool. The treatment tool is provided with: a housing (6) having a pair of first surfaces (6511A, 6511B) spaced apart from each other at a predetermined interval; an operation button (81) that has a sliding part (814) provided with a curved-surface-shaped second surface (8141) having a predetermined curvature, the operation button (81) being operated by a user; and a switching element (SW1) which is provided inside the housing (6) and which is pressed by the operation button (81) in response to a user operation performed on the operation button (81). The operation button (81) is configured so that the operation button (81) can rotate by sliding a second surface (8141) of a sliding part (814) positioned between a pair of first surfaces (6511A, 6511B) on the pair of first surfaces (6511A, 6511B) in accordance with a user's operation. 本发明提供一种处置器具。该处置器具包括：壳体(6)，其具有以预定的间隔分开的一对第1面(6511A、6511B)；操作按钮(81)，其具有滑动部(814)，并接受使用者操作，该滑动部(814)设有具有预定的曲率的曲面状的第2面(8141)；以及开关元件(SW1)，其设于壳体(6)内，与对操作