A washing machine, comprises a washing tub; a drain port; and a circulation device which is driven to return the water from the branch part to the washing tub; and a branch part. The branch part includes a filter accommodation member for accommodating a removable filter. The washing tub includes: an outflow port through which the washing water flows out; and an inflow port through which the washing water flowing out from the outflow port is returned to the washing tub. The branch part further includes: a circulation device accommodation member configured to accommodate the circulation device; a first port coupled to the outflow port; a second port coupled to the inflow port and provided in the circulation device accommodation member; and a third port coupled to the drain port. The filter includes a filter member disposed on the side of the circulation device accommodation member.