PROBLEM TO BE SOLVED: To provide a device for arranging an arrangement body, which improves arrangement body arrangement work and/or enables the arrangement body to be installed in an arrangement body support tool even in the state of pre-erection of a wall material on the front side of a wall.SOLUTION: A device for arranging an arrangement body makes a main body of the arrangement body arranged in a building material on the backside of a wall. The device for arranging the arrangement body includes an arrangement body support tool that comprises a fixing part fixed to the building material and a support part elongated to the lateral side of the building material from the fixing part to support the main body of the arrangement body, and a latching member that is attached to the main body of the arrangement body to latch the main body of the arrangement body to the support part from an orthogonal direction.
