A seawater desalination apparatus includes a spray (1), a gas supplier (9), an atomizing electrode (2), a high voltage power supply (3), a mist classifier (4), and a mist collector (5). The spray includes apertures for producing a seawater mist. The supplier supplies gas for carrying the mist from the spray. The electrode electrostatically produces fine droplets from the mist from the spray. The power supply is connected to the electrode and the spray, and applies high voltage between the electrode and the spray for the production of fine droplets from the mist from the atomizer. The classifier separates the fine droplets in the mist from the electrode. The collector collects the mist discharged from the classifier thereby producing fresh water.