<p>Disclosed is an electric rice cooker. The disclosed electric rice cooker comprises: an upper casing unit (10) having a valve unit (80) for discharging pressure; an inner bowl (20) arranged beneath the upper casing unit (10) and containing food to be cooked; a heat insulating outer bowl (30) enclosing an outer surface of the inner bowl (20) and forming a first heat sustaining space (31) between the inner bowl (20) and the outer bowl (30); a lower casing unit (40) enclosing an outer surface of the heat insulating outer bowl (30) and having a plurality of air supply ports (41); a lower heating unit (65), interposed between the heat insulating outer bowl (30) and the inner bowl (20), for generating heat; an upper heater unit (60) arranged inside the upper casing unit (10) to operate together with the lower heater unit (65); a vacuum packing unit (70) interposed between the upper casing unit (10) and the inner bowl (20) to cut off an air flow; a stopper groove (14) formed along an edge of the upper casing unit (10) facing the inner bowl (20); and a stopper protrusion (13) for causing the vacuum packing unit (70) to be caught at the stopper groove (14).</p>
