To provide a catheter of a new structure capable of securing rigidity, push-in properties, torque transmission properties, and kink resistance of the catheter while keeping the thickness of the catheter small.SOLUTION: A catheter 50 includes a slender lumen LM along a longitudinal axis, and is provided with an inner layer member 61 having an inner peripheral surface 61a that comes in contact with the lumen LM, an outer layer member 62 having an outer peripheral surface 62a of the catheter 50, a coil-like first reinforcement member 71 provided outside the inner layer member 61 between the inner peripheral surface 61a and the outer peripheral surface 62a, a braid-like second reinforcement member 72 provided outside the first reinforcement member 71 between the inner peripheral surface 61a and the outer peripheral surface 62a, and so on.SELECTED DRAWING: Figure 2【課題】カテーテルの厚みを小さく維持したままカテーテルの剛性や押し込み性、トルク伝達性、耐キンク性を確保できる、新規な構造のカテーテルを提供する。【解決手段】カテーテル５０は、長手軸に沿った細長いルーメンＬＭを有し、ルーメンＬＭに接する内周面６１ａを有する内層部材６１と、カテーテル５０の外周面６２ａを有する外層部材７１と、内周面６１ａと外周面６２ａとの間で、内層部材６１の外側に設けられたコイル状の第１補強部材７１と、内周面６１ａと外周面６２ａとの間で、第１補強部材７１の外側に設けられたブレイド状の第２補強部材７２などを備える。【選択図】図２
