A washing machine comprising: a cabinet forming an outer shape; a tub for forming a space for storing washing water inside the cabinet; a pump for discharging the washing water stored in the tub to the outside of the tub; and a valve assembly for circulating the washing water discharged from the pump to the tub, or discharging the washing water to the outside of the cabinet, wherein the valve assembly comprises: a valve housing forming an outer shape, and forming a space through which the washing water flows therein; characterized in that the valve assembly further comprises: a first chamber which forms a space inside the valve housing, and is connected to a circulation flow path for sending the washing water introduced from the pump to the tub and a drainage flow path for draining the washing water introduced through the pump to the outside of the cabinet; and a disc valve which linearly moves in both directions inside the first chamber, and selectively connects the first chamber to the drainage flow path or the circulation flow path according to a pressure of the washing water discharged from the pump. a cabinet forming an outer shape; a tub for forming a space for storing washing water inside the cabinet; a pump for discharging the washing water stored in the tub to the outside of the tub; and a valve assembly for circulating the washing water discharged from the pump to the tub, or discharging the washing water to the outside of the cabinet, wherein the valve assembly comprises: a valve housing forming an outer shape, and forming a space through which the washing water flows therein; characterized in that the valve assembly further comprises: a first chamber which forms a space inside the valve housing, and is connected to a circulation flow path for sending the washing water introduced from the pump to the tub and a drainage flow path for draining the washing water introduced through the pump to the outside of the cabinet; and a disc valve which linearly moves in both directions inside the first chamber, and selectively connects the first chamber to the drainage flow path or the circulation flow path according to a pressure of the washing water discharged from the pump. a valve housing forming an outer shape, and forming a space through which the washing water flows therein; characterized in that the valve assembly further comprises: a first chamber which forms a space inside the valve housing, and is connected to a circulation flow path for sending the washing water introduced from the pump to the tub and a drainage flow path for draining the washing water introduced through the pump to the outside of the cabinet; and a disc valve which linearly moves in both directions inside the first chamber, and selectively connects the first chamber to the drainage flow path or the circulation flow path according to a pressure of the washing water discharged from the pump. a first chamber which forms a space inside the valve housing, and is connected to a circulation flow path for sending the washing water introduced from the pump to the tub and a drainage flow path for draining the washing water introduced through the pump to the outside of the cabinet; and a disc valve which linearly moves in both directions inside the first chamber, and selectively connects the first chamber to the drainage flow path or the circulation flow path according to a pressure of the washing water discharged from the pump.