A medical knife is provided, which adopts a structure that does not make the cutting edge face upward when the load is placed on the table. The medical knife (10) has a handle (20) and a cutting edge (30), which has a protuberance (20a). When the cutting edge (30a) of the medical knife edge (30) is to be loaded on the plane with the cutting edge (30a) facing upward, the protrusion (20A) is in contact with a plane point or a plane line along the axial direction of the handle, and the protrusion (20a) is offset from the line drawn down in the vertical direction from the center of gravity of the medical knife Horizontal contact.提供醫用刀，該醫用刀採用了當載置於臺上時不使切刃朝向上方的構造。醫用刀(10)具有柄部(20)和刃部(30)，該柄部(20)具有突起部(20a)，當想要使醫用刀的刃部(30)的切刃(30a)朝向上方而載置在平面上時，該突起部(20a)與平面點接觸或者沿著柄部的軸向與平面綫接觸，而且突起部(20a)在相對於從醫用刀的重心沿鉛垂方向引下的綫偏移的位置與水平面接觸。
