PURPOSE: To reduce the materials to be used by obviating the formation of a vent hole in a medium height part of the foundation, simplifying both form and reinforcing bar operations, and having one of base rings fragmented into smallness, thereby facilitating its handling simple enough.

CONSTITUTION: In order to support a floor panel 12 and a wall panel 10 or the like, a concrete fabric foundation is composed of a basic body 2 consisting of concrete and plural base rings 7 set up on an upper end face of this basic body 2 which forms plural pieces of notch parts 3 for ventilation on the upper ends at regular intervals, installing each of the base rings 7 in a projecting parts 4 formed between the notch parts 3.