PURPOSE: To obtain a support device wherein it reduces the number of components, its assembly operation is simple and its cost is low by providing a burring caulking part wherein end parts at a plurality of erected and bent parts are fastened mutually.

CONSTITUTION: A side erected and bent part 1c in which a burring caulking part 3 has been formed in the press and working process of a base plate 1 is bent and worked. After that, a front erected and bent part 1d is bent and worked. Thereby, the burring caulking part 3 is combined with a hole. After that, when the burring caulking part 3 is caulked, the erected and bent parts 1c, 1d are fastened. Since no component is required other than the base plate 1 and an assembly operation can be performed simply, a support device can be obtained at low costs. In addition, when a caulking operation is included in a press process, its cost can be lowered further.