A cooking appliance includes a cabinet that defines an external appearance of the cooking appliance, a top plate disposed on an upper surface of the cabinet and provided with one or more first cooking units configured to execute cooking using a heat source, and a second cooking unit provided within the cabinet and configured to execute cooking using a heat source. The top plate includes protrusions protruding upward from both widthwise side parts of the top plate and a recess formed at a widthwise inner part of the top plate between the protrusions. The top plate also includes blocking members configured to block heat generated from the one or more first cooking units from being transmitted to the widthwise side parts of the top plate.