A cooking device includes a cooking chamber configured to provide a space in which food is cooked; a tray located at a bottom surface of the cooking chamber, and connected to a drive member generating rotational force; and an agitating cooking assembly supported by the tray and rotatable with the tray. The agitating cooking assembly, having an improved structure configured to cook food while simultaneously agitating the food, includes: a cooking container configured to store food therein; an agitating member configured to agitate the food while simultaneously relatively rotating in the cooking container with respect to the cooking container; and a stopper located at a rotation path of the agitating member in a manner that the agitating member relatively rotates with respect to the cooking container.