PROBLEM TO BE SOLVED: To provide a medical device capable of reducing puncture resistance while partitioning a plurality of lumens extending in the axial direction. SOLUTION: The medical device includes a tubular portion that internally divides an inner lumen located inside in the radial direction and an outer lumen located outside in the radial direction, and the side surface of the tubular portion has the distal end. The first tip opening of the inner lumen is formed in the tip surface of the tubular portion, and the second tip of the outer lumen is provided with a taper surface that reduces in diameter toward the inner side in the radial direction. The opening is formed in the tapered surface of the tubular portion. [Selection diagram] FIG.【課題】軸方向に延在する複数のルーメンを区画しつつ、穿刺抵抗を低減できる医療器具を提供する。【解決手段】医療器具は、径方向の内側に位置する内側ルーメン、及び、径方向の外側に位置する外側ルーメン、を内部に区画する筒部を備え、前記筒部の側面は、前記遠位端側に向かうにつれて径方向の内側に近づくように縮径するテーパ面を備え、前記内側ルーメンの第１先端開口は、前記筒部の先端面に形成されており、前記外側ルーメンの第２先端開口は、前記筒部の前記テーパ面に形成されている。【選択図】図４
