A drum washing machine allows a plurality of electric wires to be easily secured in a cabinet, in addition to reinforcing strength of a top plate. The drum washing machine includes a cabinet having an opening at an upper portion thereof, a top plate to cover the opening, and a reinforcement placed at a predetermined position of the opening to support and reinforce the top plate. A wire holder is provided at a predetermined portion of the reinforcement to hold the electric wires arranged in the cabinet. The drum washing machine is provided with the reinforcement, which reinforces the strength of the top plate, and allows the electric wires to be easily arranged and held in the cabinet.