Problem to be solved: to provide a catheter capable of suppressing the dispersion of the switching position while switching the axial rigidity and improving the manufacturing stability, and thus having a small dispersion of functions such as vascular selectivity and blood vessel running property.Solution: a catheter having a tubular body 10 made of resin having a change portion B in which the rigidity caused by the tubular shape in the axial direction is continuously reduced from the base end side toward the distal end side is continuously formed. At this time, the first length region A1 and the second length region A2 located on the far side of the first length region are defined in the tubular body 10 on the far side of the changing portion B. The resin hardness of the second length region A2 is lower than the resin hardness of the first length region A1.Diagram【課題】軸線方向の剛性を切り替えながら切り替え位置のばらつきを抑えて製造安定性に優れ、ひいては血管選択性や血管走行性といった機能のばらつきが少ないカテーテルを提供する。【解決手段】軸線方向において管状形態に起因する剛性が基端側から先端側に向けて連続的に小さくなる変化部Bを有する樹脂製の管状本体10を備えるカテーテルを構成する。この際に、変化部Bよりも遠位側の管状本体10において第1長さ領域a1と第1長さ領域よりも遠位側にある第2長さ領域a2とを規定する。そして、第1長さ領域a1の樹脂硬度よりも第2長さ領域a2の樹脂硬度を低くする。【選択図】図4
