Abstract: A folding sofa-bed or the like structure having a plurality of frame sections including a body section, pivotally interconnected in end-to-end relation for movement into an extended planar position to form a bed, and into a folded position to form a sofa-seat, and wherein the frame section and the body section in particular are provided with a flexible mattress supporting fabric having springs normally biasing the fabric and limiting it to a predetermined amount of sag under the weight of an occupant.