A cooking apparatus has a divider storage portion capable of storing a divider to partition a cooking chamber. The cooking apparatus includes a main body, a cooking chamber defined in the main body, a divider detachably mounted in the cooking chamber to partition the cooking chamber, a drawer, which has a storage space therein, to be slidably extracted and retracted, a drawer receiving space defined beneath the cooking chamber in the main body to receive the drawer, and a divider storage portion arranged adjacent to the drawer receiving space to store the divider removed from the cooking chamber.