A catheter having a proximal shaft and a distal shaft each having a proximal end section and a distal end section. The distal end of the proximal shaft and the proximal end of the distal shaft are joined, a catheter holding hub is joined to the proximal end of the proximal shaft, and a part of at least the distal shaft is constructed from an inner shaft and an outer shaft coaxially surrounding the inner shaft. The inner shaft is extended out from the outer shaft to the distal side. The lumen of the inner shaft forms a guidewire lumen. The catheter has a means for restricting relative movement of the outer shaft and the inner shaft occurring when pressing force exceeding a predetermined level is applied to the catheter,
