A washing pump comprising: a housing; a partition wall which vertically divides an inner space of the housing; an impeller which is rotatably disposed over the partition wall in the housing to cause washing water to flow; a heater which is disposed under the partition wall to heat the washing water in the housing so as to generate steam; a steam discharge pipe which is disposed over the partition wall to discharge the steam, generated by the heater, to an outside of the housing; a washing water inflow pipe, which is disposed below the partition wall, through which the washing water flows into the housing by rotation of the impeller; and a washing water outflow pipe, which is disposed over the partition wall, through which the washing water flows out of the housing by rotation of the impeller, wherein the steam discharge pipe is disposed in the washing water outflow pipe on the circumferential surface of the washing water outflow pipe, such that a steam discharge direction is inclined upwardly, wherein the heater is coupled to a bottom of the housing, and a part of the heater is disposed inside the housing and wherein the heater comprises: a heater cover which forms a bottom surface of the housing; a heating element which is disposed in contact with a lower side of the heater cover to heat the heater cover; and a heater plate which is disposed in contact with a lower side of the heating element and the heater cover to transfer heat of the heating element to the heater cover. a housing; a partition wall which vertically divides an inner space of the housing; an impeller which is rotatably disposed over the partition wall in the housing to cause washing water to flow; a heater which is disposed under the partition wall to heat the washing water in the housing so as to generate steam; a steam discharge pipe which is disposed over the partition wall to discharge the steam, generated by the heater, to an outside of the housing; a washing water inflow pipe, which is disposed below the partition wall, through which the washing water flows into the housing by rotation of the impeller; and a washing water outflow pipe, which is disposed over the partition wall, through which the washing water flows out of the housing by rotation of the impeller, wherein the steam discharge pipe is disposed in the washing water outflow pipe on the circumferential surface of the washing water outflow pipe, such that a steam discharge direction is inclined upwardly, wherein the heater is coupled to a bottom of the housing, and a part of the heater is disposed inside the housing and wherein the heater comprises: a heater cover which forms a bottom surface of the housing; a heating element which is disposed in contact with a lower side of the heater cover to heat the heater cover; and a heater plate which is disposed in contact with a lower side of the heating element and the heater cover to transfer heat of the heating element to the heater cover. a heater cover which forms a bottom surface of the housing; a heating element which is disposed in contact with a lower side of the heater cover to heat the heater cover; and a heater plate which is disposed in contact with a lower side of the heating element and the heater cover to transfer heat of the heating element to the heater cover.