According to the present disclosure, a washing machine includes: a cabinet; a tub disposed in the cabinet and configured to receive water; a drum rotatably disposed in the tub and configured to receive laundry; a drawer configured to be inserted into and withdrawn out of the cabinet, the drawer being configured to contain detergent; a first passage connecting the drawer and the tub; a detergent supply device disposed at the cabinet, the detergent supply device being configured to contain detergent; and a second passage disposed between the detergent supply device and the tub or between the detergent supply device and the drawer, the second passage being configured to guide the detergent contained in the detergent supply device to the tub or the drawer.