A heating cooker is composed of a front frame which covers a front end of a top plate and a side frame which covers a side end of the top plate. A front end section (edge) of the side frame is inserted into the inner side of the front frame, and the end section of the side frame is covered with the end of the front frame. An end section (edge) of the front frame is arranged along a strip-like protruding section arranged on the outer circumferential surface which is at a prescribed distance from the front end section of the side frame.
