A catheter including a catheter shaft that has a proximal shaft and a distal shaft. The proximal shaft and the distal shaft are joined to one another in the axial direction. The proximal and distal shafts are integrally connected to one another by the distal end of the proximal shaft being inserted into a hollow interior of the proximal end of the distal shaft or by the proximal end of the distal shaft being inserted into a hollow interior of the distal end of the proximal shaft. The proximal shaft includes a penetrating portion which penetrates from the inner surface through to the outer surface at the distal end of the proximal shaft. The distal shaft includes a projecting portion that includes a tip portion which extends through the penetrating portion past the inner or outer surface of the proximal shaft so that the tip portion is exposed.
