To provide a fixing member for a screw-knotted reinforcement and a fixing method thereof, by which the formation of the fixing section of the reinforcement and bar arrangement works are simplified.

A fixing material, in which a stationary plate 8 and a fixing section 9 are unified, and a fixing nut 4 are screwed to the screw-knotted reinforcement 1, opposed surfaces are abutted, and the fixing nut 4 is rotated and moved slightly to the fixing material 3 side under a pressure applied state and the fixing material 3 and the fixing nut 4 are fast stuck. Accordingly, residual stress is generated in the reverse-side axial direction of joint surfaces in both the fixing material 3 and the fixing nut 4 under the screwed state of the screw section of the screw-knotted reinforcement 1 and the screw sections of the fixing member (the fixing material 3 and the fixing nut 4), and the looseness of screw sections is removed and the screw-knotted reinforcement 1 and the fixing member are fastened firmly.