Provide a cooking device capable of processing food with a simple configuration while inhibiting oxidation of food and also inhibiting pressure inside a cooking container from rising excessively.;A cooking device processes food in an accommodation space by a processing tool rotated by a motor while an air in the accommodation space in which the processing tool to process the food is arranged is exhausted and includes a driving device (a closing member) and a check valve. The driving device opens/closes the accommodation space. The check valve allows an outflow of the air out of the accommodation space when the air in the accommodation space closed by the driving device is exhausted and also stops an opposite flow of the air after the air is exhausted.
