A medical instrument that grips a wire having a curved cross-sectional shape, and includes a sheath having a central axis and a first projecting portion that is disposed so as to advance and retreat in the lumen of the sheath and projects radially inward of the sheath. A holding portion having a first holding portion and a second holding portion having a second protruding portion protruding radially inward of the sheath, wherein the first protruding portion and the second protruding portion face each other； As described above, the first holding portion and the second holding portion are arranged with a space therebetween, and the wire is positioned between the first protruding portion and the second protruding portion so that the wire protrudes from the first protruding portion. Point contact with the second and second protrusions.断面形状が曲面を有するワイヤを把持する医療器具であって、中心軸を有するシースと、シースの内腔に進退可能に配置され、シースの径方向内方に突出した第１の突出部を有する第１の保持部と、シースの径方向内方に突出した第２の突出部を有する第２の保持部とを有する保持部と備え、第１の突出部と第２の突出部とが向かい合うように、第１の保持部と第２の保持部とが間隔をあけて配置され、第１の突出部と第２の突出部との間にワイヤを位置させて、ワイヤが第１の突出部及び第２の突出部と点接触する。
