Disclosed is a stent delivery system 1 including: a distal-side tube 2； a proximal-side tube 4； a tubular member 5 which contains a stent 3； a traction wire 6 which has one end fixed to the tubular member； and an operating section 10 which has a traction wire winding mechanism and a wire winding amount restriction mechanism for restricting the length of wire which is pulled. The operating section has an operating rotary roller 61； a winding shaft section 63 and driving gear 12 which are provided coaxially and integrally with the roller； and a driven gear 40 which is intermittently rotated by the driving gear 12. The driving gear and the driven gear have the stopper function by which rotation of the driving gear is stopped after the driving gear is rotated a predetermined amount.
