To provide a cooking device by which steam cooking can be done in a microwave oven, and the cooking device used as a microwave oven and an electromagnetic cooker.

A cooking device includes: a booking device body 11 formed of material for intercepting a microwave, that is provided with a storage part 24a having at least one cutout part 25 in the peripheral wall 21 to store water and a disposition part 24b for disposing raw material on the upside of the storage part 24a, and is shaped to project downward and open at the upper part; an outer surface heat resisting layer 12 disposed on the outer peripheral surface of the cooking device body 11; a microwave passing plate 13 liquid-tightly mounted to the cutout part 25; a drainboard 14 having a plurality of through holes 14a, which closely adheres to the inner wall of the cooking device body 11 to mark off the disposition part 24b from the storage part 24a; and a lid 15 having a base 15a made of raw material intercepting a microwave, which liquid-tightly closes the upper opening and a heat resisting layer 15b for the lid, which is disposed on the outer surface thereof.