Abstract: The invention relates to a supply device (32) for sewing material layers (16, 18, 20) of a large area sewing product such as mattress panels for example, comprising several sewing material layers (16, 18, 20), particularly at least three, preferably one sewing material layer of elastic material, for example foamed material, and one sewing material layer intended as a top layer, which layers are to be stitched together using a sewing machine (14) with at least one sewing unit, in particular a multiple-needle sewing machine, wherein said supply device consists of at least one roll receiver (34) capable of receiving at least two material rolls (24, 26, 28, 36, 38, 40), each material roll (24, 26, 28, 36, 38, 40) being rotatably supported in a holder (42) of the roll receiver (34), and wherein sewing material layers (16, 18, 20) can be removed from the material rolls (24, 26, 28, 36, 38, 40) arranged in a roll receiver (34) and fed to the sewing unit, wherein the sewing material layers (16, 18, 20) from a roll re