A synthetic resin stent, comprising: a first stent including a first stent body formed of synthetic resin fiber into a tubular structure having a mesh, the first stent being deformable from a reduced diameter state to an expanded diameter state; and a second stent formed into a tubular structure having a mesh denser than the mesh of the first stent body, the second stent arranged so as to cover an outer periphery of the first stent body, and being deformable from the reduced diameter state to the expanded diameter state, characterized in that the first stent body is formed by connecting a plurality of polygonal annular portions side by side in a longitudinal direction of the first stent, in a state in which the polygonal annular portions formed of synthetic resin fiber into a polygonal annular shape are bent or curved so as to be convex in the longitudinal direction, the plurality of polygonal annular portions include a pair of bent portions (312, 313) that are bent so as to be convex toward one side in the longitudinal direction, and a pair of bent portions (312, 313) that are bent so as to be convex toward one other side in the longitudinal direction, the plurality of polygonal annular portions are configured by connecting the plurality of polygonal annular portions side by side in the longitudinal direction in such a manner that the bent portions (312, 313) of the plurality of polygonal annular portions that face each other are connected by a tubular connecting portion in a state in which the bent portions (312, 313) of adjacent polygonal annular portions are arranged to face each other, and a pair of adjacent polygonal annular portions are connected such that mutual convex portions made of synthetic resin fiber of the adjacent polygonal annular portions are connected to each other with the tubular connecting portion connecting a pair of bent portions, and the mutual convex portions made of synthetic resin fiber of the adjacent polygonal annular portions are connected to each other with tubular connection portion connecting a pair of bent portions. a first stent including a first stent body formed of synthetic resin fiber into a tubular structure having a mesh, the first stent being deformable from a reduced diameter state to an expanded diameter state; and a second stent formed into a tubular structure having a mesh denser than the mesh of the first stent body, the second stent arranged so as to cover an outer periphery of the first stent body, and being deformable from the reduced diameter state to the expanded diameter state, characterized in that the first stent body is formed by connecting a plurality of polygonal annular portions side by side in a longitudinal direction of the first stent, in a state in which the polygonal annular portions formed of synthetic resin fiber into a polygonal annular shape are bent or curved so as to be convex in the longitudinal direction, the plurality of polygonal annular portions include a pair of bent portions (312, 313) that are bent so as to be convex toward one side in the longitudinal direction, and a pair of bent portions (312, 313) that are bent so as to be convex toward one other side in the longitudinal direction, the plurality of polygonal annular portions are configured by connecting the plurality of polygonal annular portions side by side in the longitudinal direction in such a manner that the bent portions (312, 313) of the plurality of polygonal annular portions that face each other are connected by a tubular connecting portion in a state in which the bent portions (312, 313) of adjacent polygonal annular portions are arranged to face each other, and a pair of adjacent polygonal annular portions are connected such that mutual convex portions made of synthetic resin fiber of the adjacent polygonal annular portions are connected to each other with the tubular connecting portion connecting a pair of bent portions, and the mutual convex portions made of synthetic resin fiber of the adjacent polygonal annular portions are connected to each other with tubular connection portion connecting a pair of bent portions.