Abstract: A shelf anti-sagging support brace for attachment to a side edge of a shelf to prevent the shelf from sagging or drooping. The shelf anti-sagging support brace includes an elongate member with a pair of opposite ends, and front and back side faces extending between the ends of the elongate member. The back side face of the elongate member has a pair of elongate channels therein extending between the ends of the elongate member. Each of the elongate channels is designed for receiving a side edge of a shelf therein. The channels each have a spaced apart pair of side walls, an end wall connecting the side walls of the respective channel together, and a width defined between the side walls of the respective channel. The width of one of the channels is greater than the width of the other channel.