To provide a corner fixing metal fitting made of a part can attach connection parts of a beam and a beam, a beam and a beam girder, a rafter and a girder and the like with sufficient strength without displacement by an easy operation which is inexpensively manufactured from the one part and a method for manufacturing of the corner fixing metal fitting.

The method for manufacturing of the corner fixing metal fitting includes a plate-like fixing metal fitting body forming process can bend at a substantial center part by a predetermined angle, a multiple nail forming process for forming a plurality of pin-like nails by punching at both end parts of the fixing metal fitting body formed by this fixing metal fitting body forming process except for a center part and a bending process for bending the fixing metal body at the substantially center part by 45 or 90 after the multiple nail forming process.