PROBLEM TO BE SOLVED: To provide a catheter having excellent operability. A catheter 1 for a hepatic artery introduced from a patient's arm, which is arranged at a first flexion portion 25 and a tip side of the first flexion portion 25 and is the same as the first flexion portion 25. From the second bent portion 26 that bends to the side, the third bent portion 27 that is arranged on the tip side of the second bent portion 26 and bends to the opposite side of the second bent portion 26, and the third bent portion 27. Also has a state-of-the-art portion 28 arranged on the tip side, and the minimum radius of curvature R1 of the first bent portion 25 is larger than the minimum radius of curvature R2 of the second bent portion 26. When 26 is placed in contact with the vessel wall of the celiac artery 104, the leading edge 28 faces the common hepatic artery 105 and the first flexion 25 contacts the aorta wall opposite the celiac artery 104. It is a catheter 1. [Selection diagram] Fig. 2【課題】操作性に優れたカテーテルを提供する。【解決手段】患者の腕から導入される肝動脈用のカテーテル１であって、第１屈曲部２５と、前記第１屈曲部２５よりも先端側に配置されて前記第１屈曲部２５と同じ側へ曲がる第２屈曲部２６と、前記第２屈曲部２６よりも先端側に配置されて前記第２屈曲部２６と反対側へ曲がる第３屈曲部２７と、前記第３の屈曲部２７よりも先端側に配置される最先端部２８と、を有し、前記第１屈曲部２５の最小曲率半径Ｒ１は、前記第２屈曲部２６の最小曲率半径Ｒ２よりも大きく、前記第２屈曲部２６が腹腔動脈１０４の血管壁に接触して配置された時に、前記最先端部２８が総肝動脈１０５を向き、前記第１屈曲部２５が、腹腔動脈１０４と反対側の大動脈壁に接触するカテーテル１である。【選択図】図２
