PROBLEM TO BE SOLVED: To provide a puncture device capable of suppressing erroneous administration of a substance to be administered. A puncture device (1) includes a puncture member (10), a protection position that protects the puncture member (10) in a state in which it cannot puncture living tissue, and an exposed position that exposes the puncture member (10) in a state where it can puncture biological tissue. Between the puncture member 10 and the cover member 20 that is movable relative to the puncture member 10, the detection member 30 that can detect the electrical characteristics of the living tissue by contacting the living tissue, and the cover member 20 are in the protected position. In addition, when the detection member 30 is in the non-detection state in which the electrical characteristic is not detected, the cover member 20 restricts the relative movement of the puncture member 10 from the protected position to the exposed position. In the detection state in which the cover member 20 is in the protection position and the detection member detects the electrical characteristic, the cover member 20 protects the puncture member 10 from the protection position. From dew It allows to move relative to the position. [Selection diagram] FIG.【課題】被投与物の誤投与を抑制可能な穿刺デバイスを提供する。【解決手段】穿刺デバイス１は、穿刺部材１０と、穿刺部材１０を生体組織に穿刺不能な状態に保護する保護位置と、穿刺部材１０を生体組織に穿刺可能な状態に露出させる露出位置と、の間で穿刺部材１０に対して相対的に移動可能なカバー部材２０と、生体組織に接触することで生体組織の電気的特性を検出可能な検出部材３０と、カバー部材２０が保護位置にあり、かつ、検出部材３０が電気的特性を検出していない非検出状態の場合に、カバー部材２０が、穿刺部材１０に対して、保護位置から露出位置に相対的に移動することを規制する移動規制機構４０とを備え、カバー部材２０が前記保護位置にあり、かつ、検出部材が電気的特性を検出している検出状態の場合に、カバー部材２０が、穿刺部材１０に対して、保護位置から露出位置に相対的に移動することを許容する。【選択図】図２
