The invention provides a cooking device used for preventing the heat exhausted from a pot from flowing out of the cooking device. The cooking device provided in the invention is provided with heating air layer forming parts (14,22,23,24,25), which can be used to forcefully guide the heat exhausted from the pot (2) to flow into a space (20) enclosed by a ring-shaped sealing part (12) disposed between a main body (3) and an inner cover (4) to form a heating air layer.