PROBLEM TO BE SOLVED: To provide a stent delivery catheter capable of improving operability.SOLUTION: A stent delivery catheter 10 includes a balloon catheter 11 and a stent 12 attached on the outer peripheral surface of a balloon 15 in the balloon catheter 11. An extension part 36 extending to further outside in the radial direction than the outer periphery of the stent 12 is provided in a region on the proximal end side of the stent 12 in the balloon 15. On the other hand, no extension part is provided in a region on the distal end side of the stent 12 in the balloon 15.