To provide a support, which does not bend when attached to a wall face or the like and does not cause flexion even in an adaptor, a decorative plate, etc., attached to itself, and to provide a wiring tool.

For this wiring tool 100, the support 1 is provided with reinforcement frames 4a, 4b, 4c, and 4d which are extended in the longitudinal direction of a frame 21 from a pair of tool support parts 3a and 3b and are U-shaped when viewed from the longitudinal direction of the frame 21. Hereby, the reinforcing frames 4a, 4b, 4c, and 4d do not cause the flexion of the support 1 to the side of a wiring box which arises when attaching the support 1 to the wiring box, so that the support 1 can prevent itself from bending. Since the support 1 is hard to bend, this can make it hard for flexion to does arise in an adaptor 30, etc., attached to the support 1, so that this does not induces a gap between the wall face and the adaptor 30, etc., and this becomes proper also in its external appearance.