To provide a device capable of easily assembling and fixing a transverse wire and a reinforcement to a longitudinal reinforcement for improving operating efficiency.

The assembling fixing device for the longitudinal reinforcement and the transverse wire, a reinforcement or the like is composed of a fixture 1, which has a pair of left-right arm pieces 3, 4, in which one end is continued while the other end is separated and the longitudinal reinforcement 15 can be held, and to which sites, where the transverse wire 16 and the reinforcement 15 are fitted and can be held, are installed, and a member connecting the mutual free ends of the left-right arm pieces 3, 4 in the fixture 1.