Provided is a catheter including a guiding film easily expandable and capable of preventing breakage even if a retrograde guide wire is brought into contact with a base end portion at a high load.A catheter 1 according to an embodiment of the present invention includes: a mesh member 110 having a tubular shape and radially expandable and contractable； a first hollow shaft 120, a front end tip 130； a guiding film 160 formed with a stretchable material and disposed on the mesh member 110, the guiding film 160 having a front end located between a base end of the front end tip 130 and a front end of the first hollow shaft 120； a core wire 150, in which a thickness of a base end of the guiding film 160 is larger than a thickness of the front end of the guiding film 160.
