The fluid pump includes a case including a pump chamber, a suction port and a discharge port mounted on the case so as to communicate with the pump chamber, an impeller having pump vanes and rotatably placed in the pump chamber, which suctions, when rotated, a fluid into the pump chamber via the suction port and discharges the fluid out of the pump chamber via the discharge port, a pressure generating protrusion located inside the pump chamber at a position between the suction port and the discharge port, so as to confront the pump vanes, and a motor for driving the impeller, installed in the case and having a stator and a rotor to which the impeller is integrally attached for rotating together. In the fluid pump, at least a lateral portion of the pressure generating protrusion on the side of the discharge port is formed in a smooth slope or curved surface.