A cooking apparatus includes a main body; a cooking chamber defined in the main body; a removable divider designed to be placed 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 to receive the drawer; a divider storage space arranged between the cooking chamber and the drawer receiving space to store the divider removed from the cooking chamber; and an insulation member provided between the cooking chamber and the divider storage space. The divider storage space is accessible while the drawer is open.