A stent includes a major axis member which has an internal space extending from a front end portion toward a base end portion, first opening section provided at the front end portion to communicate with the internal space, and second opening section provided at the base end portion to communicate with the internal space, and inflow prevention section which has an inflow prevention surface covering the second opening section with a gap with respect to the second opening section, wherein a first edge section of the inflow prevention surface is fixed to the major axis member closer to a base end than the second opening section, and a second edge section of the inflow prevention surface is disposed closer to a front end than the second opening section and extends from a side surface of the major axis member toward a position spaced apart therefrom outward in a radial direction.
