A medical puncture needle according to the present invention includes a tip portion including a needle tip, and a rod-shaped main body portion continuous with the tip portion, the tip portion including a blade surface, and the blade surface including the main body. A first blade surface portion that is inclined with respect to the central axis of the portion and extends to the needle tip, and a second blade surface portion formed on the back side of the first blade surface portion, wherein the second blade surface portion is When a single virtual plane including the central axis of the main body is set, a curved surface in which the angle with respect to the virtual plane in a cross section orthogonal to the central axis direction gradually increases toward the needle tip side in the central axis direction. It is configured.本発明に係る医療用の穿刺針は、針先を含む先端部と、当該先端部と連続する棒状の本体部と、を備え、前記先端部は刃面を備え、前記刃面は、前記本体部の中心軸線に対して傾斜し、前記針先まで延在する第１刃面部と、前記第１刃面部の裏側に形成された第２刃面部と、を備え、前記第２刃面部は、前記本体部の中心軸線を含む１つの仮想平面を設定した場合に、前記中心軸線方向において前記針先側に向かうにつれて、前記中心軸線方向に直交する断面における前記仮想平面に対する角度が漸増する曲面で構成されている。
