A stent delivery system which is inserted into an endoscope and is for placing a stent inside a body cavity, this stent delivery system being provided with a long pusher catheter which is flexible a guide catheter which can pass through the lumen of the pusher catheter in a freely advancing and retracting manner and a stent which is disposed to the front end of the pusher catheter, and has a cylindrical stent main body into which the guide catheter can be inserted, and a grip piece that is attached so as to extend from the main body and consists of a long narrow member that is pliable and can be disposed in the space between the guide catheter when it is inserted into the lumen of the pusher catheter.
