PURPOSE: To provide an economocal coupling metal tool for supporting which is useful for increase of working efficiency and simple in the constitution, firm, and inexpensive and further, which can be easily, rapidly, and securely fitted to specified positions and easily handled and also which is excellent in workability and can be fixed (reinforced) by horizontal members and diagonal members without hindrance to other horizontal connecting materials or diagonal materials and which greatly increases degree of freedom on constructing supports.

CONSTITUTION: This coupling metal tool A for supporting is fitted to a post 40 and horizontal materials or diagonal materials can be connected to the post 40. The coupling metal tool is composed of a clamp 1 fixing horizontal materials or diagonal materials, a fitting part 8 detachably setting to a fixing metal tool B attached at specified positions of the post at every specified interval, and a distance-adjuster 7 connecting the fitting part 8 and the clamp 1 with a specified distance. The horizontal materials or diagonal materials fixed to the clamp 1 are connected at the position separated by a specified distance from the external surface of the post 40.