Provided is a washing machine including: a packing water-sealing part having a packing component arranged between an upper end part of the tub and an upper end part of the drum to inhibit water from leaking outwards from the tub; a labyrinth part adopting a labyrinth structure and for arranging ribs lower than the packing water-sealing part between an tub cover and the upper end part of the drum at an inner side of the packing water-sealing part; and a hopper serving as a heightened drum and arranged integrally with the tub cover for retaining water whose water level is higher than a water level at the upper end of the drum.
