A food tray is automatically convertible from a flat position to an erect, elevated position. The food tray is fabricated as a blank, preferably of rigid cardboard, which is appropriately folded and, with interlocking tabs, assembled to lay flat under the food, particularly a pizza pie, when the pizza remains in its flat delivery box. When the pizza is to be removed from its box, the central tray section of the convertible food tray is lifted, with the pizza thereon. This permits folded wing sections of the tray located beneath the central section to swing down to become tray leg support members. When the support members of the tray are placed on a table or similar surface, the weight of the pizza on the central section compels the support members inward, to a position perpendicular to the central section, to securely provide elevated support to the pizza on the food tray.