A drinking water purifying apparatus for purifying water from a water service comprises an ozone generating means for producing ozonized gas, an ozone reaction means for reacting the ozonized gas from the ozone generating means with the water from a water service, and a treating means for treating the water obtained by reaction to the ozonized gas in the ozone reaction means, whereby drinking water being free from organic compounds and smelling substances and having good taste can be obtained.
