Abstract: A workpiece guide device for sewing machines, especially for the edge-true seaming of at least two workpiece (fabric) pieces, e.g. trouser parts, on a sewing machine, comprises a vertically disposed linear-guide element on the sewing table for alignment of the edges of the pieces to be guided horizontally, and a three-plate stack extending generally transversely to the plane of the linear edge guide and mounted upon a slide for movement toward and away from the stitching location. Preferably clamping means is provided to engage the fabric pieces between the plates.