PURPOSE: To mass-produce a porous fabric elastic body efficiently by laminating and pressing a liquid reinforcing elastic material and a hollow net-shaped fabric consecutively and further laminating a liquid reinforcing material on the surface and thereafter foaming and curing the liquid reinforcing elastic material.

CONSTITUTION: A glass cloth 4 is laminated onto a main body conveyor from a supplier 5 and a liquid foaming material (reinforcing elastic material) 9 is supplied thereon in the form of a sheet by means of a supplying nozzle 10 and a doctor knife 11. At the same time, a hollow net-shaped fabric 2 is supplied onto the glass cloth 4 by means of laminate rolls 12 via a roll guidance 15, a conveyor 6, and a dryer 7 and then subjected to a lamination process and further heated and foam-cured by means of an oven 13 wherein the glass cloth 4 is stripped off via a cooling device 14 and the hollow net-shaped fabric 2 is wound up. In the next place, on the other surface, the foaming material 9 is laminated in the same manner and then heated and foamed for obtaining a porous fabric elastic body. In this way, a porous fabric elastic body such as cushion mat or the like can be mass-produced efficiently.