PROBLEM TO BE SOLVED: To provide a catheter capable of easily confirming that a retrograde guide wire has been inserted into a hollow shaft. SOLUTION: The catheter 1 includes a hollow shaft 11, a tubular mesh member 21 having a proximal end joined to a distal end of the hollow shaft 11 and configured to expand or contract in a radial direction, and a mesh member 21. The tip tip 31 joined to the tip is passed through the inside of the mesh member 21 and the hollow shaft 11 so that the tip is joined to the tip tip 31 and the base end is located closer to the base end side than the base end of the hollow shaft 11. A core wire 41 extending in the direction of the hollow shaft 11, and at least two radiopaque markers 71 that are provided integrally with or separately from the hollow shaft 11 and are separated from each other in the longitudinal direction of the hollow shaft 11. [Selection diagram] Figure 1【課題】例えば逆行性ガイドワイヤが中空シャフト内に挿入されたことを容易に確認することができるカテーテルを提供する。【解決手段】当該カテーテル１は、中空シャフト１１と、基端が中空シャフト１１の先端に接合され、径方向に拡張または収縮するように構成されたチューブ状のメッシュ部材２１と、メッシュ部材２１の先端に接合された先端チップ３１と、先端が先端チップ３１に接合され、基端が中空シャフト１１の基端よりも基端側に位置するように、メッシュ部材２１および中空シャフト１１の内部を通って延びるコアワイヤ４１と、中空シャフト１１に一体または別体として設けられ、中空シャフト１１の長軸方向において離間する少なくとも二つの放射線不透過性のマーカ７１と、を備えている。【選択図】図１
