Patent ID: 8685081

Claim:
A medical stent comprising: a main body having an approximately tubular shape extending along a longitudinal axis, wherein the main body is formed of a first resin material; an elastic member comprising a first end portion and a second end portion, wherein the elastic member is formed of a second resin material having a larger flexural modulus than the first resin material; and a first treated layer arranged between an end portion of the main body and the first end portion of the elastic member, wherein the first treated layer is formed of a functional group that joins the end portion of the main body and the first end portion of the elastic member, wherein the second end portion of the elastic member extends from the first end portion of the elastic member toward a central portion side of the main body along the longitudinal axis and radially away from the main body, wherein a melting temperature of the second resin material is higher than a melting temperature of the first resin material, and the first end portion of the elastic member is joined to the end portion of the main body at a temperature equal to or higher than the melting temperature of the first resin material and lower than the melting temperature of the second resin material, wherein the second resin material is fluororesin, and wherein the first treated layer is formed by chemically treating an outer circumferential surface of the first end portion of the elastic member so that a surface reforming of the outer circumferential surface of the first end portion is performed.