Provided is a puncture device capable of administering (supplying) a drug solution. A puncture tip (2), a first tubular body (3) connected to the puncture tip (2) at a distal end, and an outer tubular body covering at least a portion of the first tubular body (3). (5), wherein the first tubular body (3) is formed so as to be rotatable about an axis along a longitudinal direction, and an outer diameter of the first tubular body (3) is an outer tubular body. A chemical solution supply path (5a) is provided outside the first tubular body (3), which is smaller than the inner diameter of (5).薬液の投与（供給）を行なうことが可能な穿刺器具を提供する。 穿刺先端部（２）と、遠位端にて穿刺先端部（２）に接続される第１の管状体（３）と、第１の管状体（３）の少なくとも一部を覆う外側管状体（５）と、を備え、第１の管状体（３）は長手方向に沿った軸の周りに回転可能に形成されており、第１の管状体（３）の外径は、外側管状体（５）の内径よりも小さく、第１の管状体（３）外側に、薬液供給路（５ａ）が設けられている。
