It is an object of the present invention to provide a catheter that can reliably receive a retrograde guide wire through an aperture. The catheter 2 of the present invention is arranged on a tube-shaped mesh member that can be expanded and contracted in the radial direction, a first hollow shaft 120, a distal tip 130, and a mesh member 110, and the distal end is a proximal end of the distal tip 130. The guide membrane 160 located between the distal end of the first hollow shaft 120 and the distal tip 130 is connected to the proximal end side in the space inside the mesh member 110, and the proximal end is the first end. The second hollow shaft 240 located between the distal end of the hollow shaft 120 and the proximal end of the distal end tip 130, the core wire 250, and the cross-sectional shape are substantially annular or substantially C-shaped, and are provided on the core wire 250. And a holding member 280 that covers the second hollow shaft 240.逆行性ガイドワイヤを目開きを介して確実に受け入れることができるカテーテルの提供を目的とする。 本発明のカテーテル２は、径方向に拡縮可能なチューブ状のメッシュ部材と、第１の中空シャフト１２０と、先端チップ１３０と、メッシュ部材１１０に配置され、先端が、先端チップ１３０の基端と第１の中空シャフト１２０の先端との間に位置する誘導膜１６０と、先端チップ１３０に接続され、メッシュ部材１１０の内側の空間にて基端側に突設し、基端が、第１の中空シャフト１２０の先端と先端チップ１３０の基端との間に位置する第２の中空シャフト２４０と、コアワイヤ２５０と、横断面視の形状が略環状または略Ｃ形状であり、コアワイヤ２５０に設けられ、第２中空シャフト２４０を覆う保持部材２８０とを備えている。
