There is provided a high-frequency heating apparatus including a heating chamber that houses an object to be heated, a rotating turntable provided on a bottom surface of the heating chamber, on which the object to be heated is rotatably mounted; a high-frequency heating section (21) that heats the object to be heated which is housed in the heating chamber, a convection heater (27) for heating the heating chamber, a circulating fan (28) for supplying the heating chamber with heat of the convection heater (27) as hot air, and a grill heater (33) for heating the object to be heated, wherein the convection heater (27) and the grill heater (33) are separately disposed on an upper surface of the heating chamber, thereby allowing reduction in size of an external shape of the heating apparatus without sacrificing grill cooking performance and oven cooking performance.