Abstract: A household appliance has a storage compartment, a container, and a pair of guide rail assemblies. The storage compartment has a front opening and a pair of side walls; the container includes an accommodating cavity and a cover used for closing an upwardly open access opening of the accommodating cavity. The cover may slide from front to back to expose the access opening; the pair of guide rail assemblies respectively include a first rail and a second rail, where the second rail is adapted to slide relative to the first rail; and the guide rail assembly includes a locking mechanism. When the container is pulled out and reaches a predetermined position, the locking mechanism locks the first rail and the second rail to prevent the container from moving backward driven by the cover pushed backward.