PURPOSE: To prevent leakage of a radio wave, leakage of steam, smoke to the exterior during cooking.

CONSTITUTION: A grill oven range is so constituted that the air is sucked from a lower grill 3 provided at a lower front surface and discharged from an upper grill 4 provided on an upper front surface, and comprises openings 7, 8 formed along positions of a vent passage 5 from the grill 3 inward and a vent passage 6 from the grill 4 inward in contact with lower and upper edges 1a, 1b of a front surface plate 1 of a cavity.