A washer pump configured to suck liquid stored in a tank and configured to jet the liquid to a surface to be cleaned, comprising: a motor that rotates around a rotation shaft in forward and reverse directions; a housing that accommodates the motor; an impeller that is rotated by the motor in forward and reverse directions; a pump chamber in which the impeller is housed; a pair of valve chambers (33a, 33b) in which the liquid flows in response to the rotation direction of the impeller; a changeover valve for partitioning the pair of valve chambers, a pair of discharge holes (33e, 33f) provided on both sides of the switching valve in the moving direction; and a pair of flow paths (34, 35) provided between the pump chamber and the pair of valve chambers, characterized in that the pump chamber, the valve chamber (33a, 33b), the discharge hole (33e, 33f), and the flow paths (34, 35) are integrally provided to each other in the housing, and each of the flow paths on the same sides as the valve chambers extends to such each position of the discharge holes as to be capable of being discharged at a portion closer to each central portion of the valve chambers, one flow path of the flow paths, which is on a front side, includes: an inclined wall provided on an inside of a side wall of the housing and gradually increasing a flow passage area from one of the pump chambers to one of the valve chambers; and an opposed wall disposed so as to be opposed to the inclined wall and is provided parallel to the side wall of the housing near the side wall, and curved wall portions are formed in front of outlet portions of the flow paths in the valve chambers. a motor that rotates around a rotation shaft in forward and reverse directions; a housing that accommodates the motor; an impeller that is rotated by the motor in forward and reverse directions; a pump chamber in which the impeller is housed; a pair of valve chambers (33a, 33b) in which the liquid flows in response to the rotation direction of the impeller; a changeover valve for partitioning the pair of valve chambers, a pair of discharge holes (33e, 33f) provided on both sides of the switching valve in the moving direction; and a pair of flow paths (34, 35) provided between the pump chamber and the pair of valve chambers, characterized in that the pump chamber, the valve chamber (33a, 33b), the discharge hole (33e, 33f), and the flow paths (34, 35) are integrally provided to each other in the housing, and each of the flow paths on the same sides as the valve chambers extends to such each position of the discharge holes as to be capable of being discharged at a portion closer to each central portion of the valve chambers, one flow path of the flow paths, which is on a front side, includes: an inclined wall provided on an inside of a side wall of the housing and gradually increasing a flow passage area from one of the pump chambers to one of the valve chambers; and an opposed wall disposed so as to be opposed to the inclined wall and is provided parallel to the side wall of the housing near the side wall, and an inclined wall provided on an inside of a side wall of the housing and gradually increasing a flow passage area from one of the pump chambers to one of the valve chambers; and an opposed wall disposed so as to be opposed to the inclined wall and is provided parallel to the side wall of the housing near the side wall, and curved wall portions are formed in front of outlet portions of the flow paths in the valve chambers.