A stent includes a cylindrical main body (2) contractible and expandable in a circumferential direction, a cover member (C) coated on inner and/or outer circumference of the main body (2), and an inverse current preventing member (6) for preventing food or fluid from reversely flowing. The inverse current preventing member (6) is disposed in the main body (2) and includes a fixing layer (6a) defining a passage (H) having a diameter capable of allowing food and fluid to pass, the fixing layer (6a) being fixed in the main body (2) and a valve layer (6b) extending from the fixing layer (6a) to a distal end of the main body (2).
