<p>Disclosed is a water emulsion production apparatus comprising: a water emulsion container; a pump for applying a pressure to an oil-water mixed solution; an injection nozzle for injecting the oil-water mixed solution supplied through the pump into the water emulsion container; and a collision plate which is arranged opposed to the injection nozzle in the water emulsion container, and against which the oil-water mixed solution injected through the injection nozzle is caused to collide.</p>
