To improve the ease, efficiency and safety of scaffolding assembling or dismantling work by using lightweight and strong components.

The installation structure of detached house scaffolding comprises a plurality of supports erected on ground at an appropriate interval, a bracket with a wedge inserted into a wedge receiver 2 fixed to each support, a scaffolding board removably hung between the two brackets and a handrail 30 having the wedge 3 received into the wedge receiver. The wedge receiver 2 is nearly U-shaped form in section, and its leg piece 2a is molded by extrusion so that its outer end may have a taper 2b and cut into a desired length. In the state of this leg end of wedge receiver being in contact with the outer circumference of the support 10, the thin walled step and the outer circumference of the support are fixed together by welding W.