A method of manufacturing an eyelet (1, 1A, 1B, 1C), comprising: forming a metal base material by cutting a metal wire material; placing the metal base material in a first recessed portion of a die, the first recessed portion having a circular planar shape, and arranging a disk-shaped first punch on a first face of the metal base material, such that an outer circumferential face of the first punch and an outer circumferential face of the metal base material are in contact with an inner circumferential face of the first recessed portion of the die; flattening the first face and a second face of the metal base material by lowering the first punch along the first recessed portion while the first punch engages with the first recessed portion so as to apply pressure to the metal base material; placing the metal base material having the flattened first face and the flattened second face in a second recessed portion of a die, the second recessed portion having a circular planar shape, and arranging a disk-shaped second punch on the first face of the metal base material, such that an annular shape gap in a plan view is formed between the outer circumferential face of the metal base material and an inner circumferential face of the second recessed portion; forming a base body of which width is greater than a width of the metal base material by lowering the second punch along the second recessed portion while the second punch engages with the second recessed portion so as to apply forge processing on the metal base material of which the first face and the second face are flattened; and forming a through hole penetrating through the base body in a thickness direction by punching through the base body. forming a metal base material by cutting a metal wire material; placing the metal base material in a first recessed portion of a die, the first recessed portion having a circular planar shape, and arranging a disk-shaped first punch on a first face of the metal base material, such that an outer circumferential face of the first punch and an outer circumferential face of the metal base material are in contact with an inner circumferential face of the first recessed portion of the die; flattening the first face and a second face of the metal base material by lowering the first punch along the first recessed portion while the first punch engages with the first recessed portion so as to apply pressure to the metal base material; placing the metal base material having the flattened first face and the flattened second face in a second recessed portion of a die, the second recessed portion having a circular planar shape, and arranging a disk-shaped second punch on the first face of the metal base material, such that an annular shape gap in a plan view is formed between the outer circumferential face of the metal base material and an inner circumferential face of the second recessed portion; forming a base body of which width is greater than a width of the metal base material by lowering the second punch along the second recessed portion while the second punch engages with the second recessed portion so as to apply forge processing on the metal base material of which the first face and the second face are flattened; and forming a through hole penetrating through the base body in a thickness direction by punching through the base body.