A heating cooker includes a top plate, a front frame for covering a front edge of the top plate, and opposite side frames for covering respective side edges of the top plate. A front end (edge) of each of the side frames is inserted into and covered by a side portion of the front frame. The side frame has a ridge formed on an outer surface thereof at a location a predetermined distance spaced apart from a front edge thereof such that the ridge is positioned along a rear end (edge) of the front frame.
