A medical instrument capable of determining whether or not a puncture part is properly punctured into a living tissue. A medical instrument includes an elongated puncture unit capable of puncturing a biological tissue, and a plurality of detection units capable of detecting a contact state with the biological tissue, wherein the plurality of detection units are the puncture unit. A pair of puncture detection units provided at different positions in the circumferential direction of the unit. [Selection] Figure 11【課題】穿刺部が生体組織に適切に穿刺されているか否かを判定可能な医療器具を提供する。【解決手段】医療器具は、生体組織に穿刺可能な長尺状の穿刺部と、生体組織との接触状態を検知可能な複数の検知部と、を備え、前記複数の検知部は、前記穿刺部の周方向で互いに異なる位置に設けられた一対の穿刺検知部を含む。【選択図】図１１
