A dishwasher having an automatic cleaning filter, the dishwasher, comprising: a tub having a washing space for accommodating one or more objects to be cleaned; a sump disposed under the washing space and configured to store a washing liquid; a washing pump connected to the sump and configured to re-circulate a washing liquid, the automatic cleaning filter is disposed in the sump and comprises: a rotating filter comprising a plurality of first holes and a lateral surface portion surrounding a predetermined vacant space; an inlet guide comprising a first inlet through which a washing liquid including foreign substances is introduced, a first outlet configured to communicate with the first inlet and to discharge the washing liquid including foreign substances into the rotating filter, and a body connecting the first inlet and the first outlet; a filter housing disposed outside the rotating filter, the filter housing comprises a housing wall surrounding the lateral surface portion of the rotating filter and a second outlet passing through the housing wall and configured to discharge a washing liquid, from which foreign substances are filtered by the rotating filter, outward; and a driver configured to rotate the rotating filter, wherein the rotating filter rotates in one direction with respect to the inlet guide and the filter housing, wherein the first outlet is formed toward a part of the inner circumferential surface of the lateral surface portion in a predetermined direction, and characterized in that the predetermined vacant space inside the rotating filter is divided into a first area and a second area with respect to a virtual partition that connects a part of the inner circumferential surface of the rotating filter, disposed in the predetermined direction, and the second outlet and that extends in an up-down direction. a tub having a washing space for accommodating one or more objects to be cleaned; a sump disposed under the washing space and configured to store a washing liquid; a washing pump connected to the sump and configured to re-circulate a washing liquid, the automatic cleaning filter is disposed in the sump and comprises: a rotating filter comprising a plurality of first holes and a lateral surface portion surrounding a predetermined vacant space; an inlet guide comprising a first inlet through which a washing liquid including foreign substances is introduced, a first outlet configured to communicate with the first inlet and to discharge the washing liquid including foreign substances into the rotating filter, and a body connecting the first inlet and the first outlet; a filter housing disposed outside the rotating filter, the filter housing comprises a housing wall surrounding the lateral surface portion of the rotating filter and a second outlet passing through the housing wall and configured to discharge a washing liquid, from which foreign substances are filtered by the rotating filter, outward; and a driver configured to rotate the rotating filter, wherein the rotating filter rotates in one direction with respect to the inlet guide and the filter housing, wherein the first outlet is formed toward a part of the inner circumferential surface of the lateral surface portion in a predetermined direction, and characterized in that the predetermined vacant space inside the rotating filter is divided into a first area and a second area with respect to a virtual partition that connects a part of the inner circumferential surface of the rotating filter, disposed in the predetermined direction, and the second outlet and that extends in an up-down direction. a rotating filter comprising a plurality of first holes and a lateral surface portion surrounding a predetermined vacant space; an inlet guide comprising a first inlet through which a washing liquid including foreign substances is introduced, a first outlet configured to communicate with the first inlet and to discharge the washing liquid including foreign substances into the rotating filter, and a body connecting the first inlet and the first outlet; a filter housing disposed outside the rotating filter, the filter housing comprises a housing wall surrounding the lateral surface portion of the rotating filter and a second outlet passing through the housing wall and configured to discharge a washing liquid, from which foreign substances are filtered by the rotating filter, outward; and a driver configured to rotate the rotating filter, wherein the rotating filter rotates in one direction with respect to the inlet guide and the filter housing, wherein the first outlet is formed toward a part of the inner circumferential surface of the lateral surface portion in a predetermined direction, and characterized in that the predetermined vacant space inside the rotating filter is divided into a first area and a second area with respect to a virtual partition that connects a part of the inner circumferential surface of the rotating filter, disposed in the predetermined direction, and the second outlet and that extends in an up-down direction.