A medical puncture needle (1) according to the present invention comprises a main body part (2) having a substantially circular cross section orthogonal to a central axis direction (A), a main body part (2) continuous with one end of the main body part And a distal end portion (3) having a flat outer shape in a cross section orthogonal to the central axis direction (A), wherein the distal end portion (3) has a needle point (8) at one end (5) and a second blade surface portion (6) which form a blade edge (9) to be formed in the center axis direction (A), and the needle point (8) Is located inside the outer periphery of the main body (2).本発明に係る医療用の穿刺針(1)は、中心軸線方向(A)と直交する断面が略円形状の外形を有する本体部(2)と、前記本体部(2)の一端に連続し、前記中心軸線方向(A)と直交する断面が扁平状の外形を有する先端部(3)と、を備え、前記先端部(3)は、互いが交差する稜線により針先(8)を一端とする刃縁(9)を形成する第1刃面部(5)及び第2刃面部(6)を備え、前記針先(8)は、前記中心軸線方向(A)で見た場合に、前記本体部(2)の外周よりも内側に位置する。
