Patent ID: 7879080

Claim:
A stent placement device comprising: a stent to be placed in an opening formed in a body cavity; a holding portion configured to hold the stent; a needle configured to be inserted into the body cavity and inserted and located through the holding portion so as to be movable forward/backward in the axial direction of the holding portion in order to form an opening in the body cavity; a tube body adapted to loosely fit on an outer circumference of the holding portion; and a lock portion which is provided to the holding portion, is elastically deformable into a state insertable into the stent, locks the stent by deformation with a diameter of the lock portion expanded at a tip end of the tube body and elastically deforms from a state of locking the stent to a state of not locking the stent, wherein the tube body, the holding portion or the needle is relatively moved to elastically deform the lock portion from a locked position to a nonlocked position of the stent, to cause the stent to be detached and placed in the body cavity.