A washing machine comprising: a tub containing wash water; a pump case including an inflow chamber into which the wash water in the tub flows, a circulation pump chamber provided at one side of the inflow chamber to supply wash water to the tub, and a drain pump chamber provided at the other side of the inflow chamber to discharge the wash water to the outside of a main body; and a pump filter installed in the inflow chamber to filter out foreign substances from the wash water, wherein: the pump filter includes a first filter part passing wash water flowing into the circulation pump chamber through a plurality of first holes (182, 183) and a second filter part passing wash water flowing into the drain pump chamber through a plurality of second holes (192, 193) bigger than the first collection holes (182, 183); characterized in that the first filter part includes a blocking wall preventing the wash water from rectilinearly flowing into the circulation pump chamber and guiding detouring of the wash water, wherein pump filter further includes a direction adjustment groove formed to adjust positions of the first filter part and the second filter part within the inflow chamber wherein the pump case further includes a direction adjustment rib protruding to be inserted into the direction adjustment groove of the pump filter. a tub containing wash water; a pump case including an inflow chamber into which the wash water in the tub flows, a circulation pump chamber provided at one side of the inflow chamber to supply wash water to the tub, and a drain pump chamber provided at the other side of the inflow chamber to discharge the wash water to the outside of a main body; and a pump filter installed in the inflow chamber to filter out foreign substances from the wash water, wherein: the pump filter includes a first filter part passing wash water flowing into the circulation pump chamber through a plurality of first holes (182, 183) and a second filter part passing wash water flowing into the drain pump chamber through a plurality of second holes (192, 193) bigger than the first collection holes (182, 183); characterized in that the first filter part includes a blocking wall preventing the wash water from rectilinearly flowing into the circulation pump chamber and guiding detouring of the wash water, wherein pump filter further includes a direction adjustment groove formed to adjust positions of the first filter part and the second filter part within the inflow chamber wherein the pump case further includes a direction adjustment rib protruding to be inserted into the direction adjustment groove of the pump filter. the pump filter includes a first filter part passing wash water flowing into the circulation pump chamber through a plurality of first holes (182, 183) and a second filter part passing wash water flowing into the drain pump chamber through a plurality of second holes (192, 193) bigger than the first collection holes (182, 183); characterized in that the first filter part includes a blocking wall preventing the wash water from rectilinearly flowing into the circulation pump chamber and guiding detouring of the wash water, wherein pump filter further includes a direction adjustment groove formed to adjust positions of the first filter part and the second filter part within the inflow chamber wherein the pump case further includes a direction adjustment rib protruding to be inserted into the direction adjustment groove of the pump filter.