A stent graft delivery system in which a stent graft (6) is retained on a delivery device (2) such that a longitudinal portion of the stent graft is releasably retained on the delivery device to bend therewith. The delivery device (2) has a guide wire catheter (3) and the stent graft is retained onto the guide wire catheter by a release wire (24) which can be withdrawn. The release wire is wound around the guide wire catheter and through the stent graft or suture loops engage around the guide wire catheter and release wire.
