Abstract: A panel connector system comprises two opposed elongated channels mounted on adjacent portions of two panels to be connected, and fittings and fasteners for securing the channels together. Each channel has a base, end flanges at the opposite ends of the base and a central tenon. The fittings are coupled by the fasteners and engage the central tenons to couple the channels. A plurality of pairs of fittings having lengths significantly less than that of the channels and spaced along the length of the channels can be employed to connect the channels. Additionally, slots can be formed in the channels between the central tenons and end flanges for receiving concealing strips which cover the fittings and fasteners. Adjustable support members and brackets for supporting shelves or cabinets on the panels can also be secured to the channels.