PURPOSE: To make it possible to obtain drinking water close to natural water in terms of taste by filling a cylindrical container with particles of pure silver, ore and coral sand as a filter medium.

CONSTITUTION: A cylindrical container 1 equipped with an incoming water aperture 1c and an outgoing water aperture 1d on both ends is provided in a drinking water strainer. A mixture of sintered particles of pure silver or pure silver-coated particles A, particles B of ore which generate an ultraelectromagnetic wave in water and coral sand particles C are loaded in the cylindrical container 1 as fillers. The cylindrical container 1 is connected to a city water supply system tap to allow permeation of tap water into the interior of the container 1. The mentioned pure silver particles A have bacterial control effects, the mentioned ore particles B have instantaneous water activation effects and the mentioned coral sand particles C have tap water mineralization effects. The synergic action of these three different elements produces water suited for drinking.