A stent delivery system 1 includes a distal-side tube 2, a proximal-side tube 4, a fixing tube 8, a stent containing tubular member 5, a stent 3, and a pulling wire 6 which configures movement means for moving the stent containing tubular member 5 to the proximal side. The distal-side tube 2 includes a distal-side priming slit 45 which is provided in a side wall in proximity to a stent proximal end lock section 22 and a proximal-side priming slit 46 which is provided in a side wall on the proximal side of the distal-side tube 2. The slits 45 and 46 are opened by injecting liquid, with the distal opening 25a or the rear end opening 23 of a guide wire lumen 21 of the distal-side tube 2 closed.
