PURPOSE: To provide a light-weight small-size drinking water cooler which can obtain cold water of suitable temperature without freezing drinking water by skillfully utilizing refrigerating capacity obtained by the thermomodule of a Peltier element.

CONSTITUTION: The electronic refrigeration type drinking water cooler comprises a thermal storage vessel 10 containing phase change type latent heat thermal storage material 11 having a melting point of 5-10°C as a thermal storage material in a vessel, a drinking water cooling coil 3 dipped in the material and piped to the vessel, and a thermomodule 11 of a Peltier element in which heat absorbing and generating surfaces are mounted in the vessel toward the interior and the exterior. The thermomodule is energized to electronically cool the material to store the heat in the form of latent heat, and drinking water fed to the coil is cooled to cold water of low temperature, and supplied.