WASHING MACHINE

PURPOSE: A washing machine is provided to recycle a part of water discharged in a laundry process as washing water, and to supply or discharge the washing water selectively used in the laundry process. CONSTITUTION: A washing machine includes a casing(2), an outer container, an inner container, a drain hose, a drain pump, a circulation hose, a discharge hose, and a valve. The outer container(5) is installed at an inner side of the casing. The inner container(4) is pivotally installed at an inner side of the outer container. The drain hose(6) is connected to the outer container. The drain pump(20) is connected to the drain hose. The circulation hose(26) and the discharge hose(27) are connected to the drain pump. The valve adjusts a flow rate of the circulation hose and the discharge hose.