Abstract: A modular display rack is formed by interconnected modular display units. Each such unit consists of a base member, a back member connected to and rising above the base member at the rear thereof, and a front member connected to and depending beneath the base member at the front thereof. The front member has flanges forming a transverse channel therein and the back member has projections thereon which slidably fit within the transverse channel to interconnect two units together, with the back member of one unit releasably coupled to the front member of another unit. Projections on the undersides of the base members can receive leg members to support the units and brackets to assemble multi-tier displays. Openings along the sides of the units receive side rails which prevent products displayed on the base members from being laterally dislodged.