A household appliance including an appliance door and a container to receive goods to be treated. The container has a container opening that is closed by the appliance door. The household appliance further includes stiffeners that are associated, at least in sections, with the container opening. The stiffeners increase the rigidity of the container in a region of the container opening and have a centering element by which the appliance door is aligned with the container opening when the appliance door is closed. The stiffeners and the centering element are made of a uniform material and/or embodied in one piece as a plastic profile part.