PROBLEM TO BE SOLVED: To provide a method for manufacturing a ring body which is located between woody structural materials when joining the woody structural materials and of which a strength of an insertion end is increased, a ring body manufactured by such a method, and a joining metal fitting with use of the ring body.SOLUTION: A method for manufacturing a ring body 15 which is inserted from an insertion end side of an axial direction end and is so located as to be embedded in a recess formed on a surface of a woody structural material at a connection between the woody structural material and a structural skeleton, and which is used as a joining metal fitting together with a bolt and a nut. According to the method, a flat tabular blank is placed on a die, the die is pushed into a hole on the die side by a punch thereby forming, from the blank, a cylindrical vessel-like intermediate processed body comprising a bottom having a circular outer periphery and a cylindrical part 11 rising the bottom outer periphe
