<p>A beverage dispenser in which the entry of bacteria into a tank and a raw water container can be prevented at source by a simple structure. By providing an air intake port (13) for taking air into a low-temperature tank (4) with a lowering of the water level in the tank on a ceiling of the tank, connecting an air chamber (14) having an air inflow port (16) for air from outside to the air intake port (13), and providing an ozone generating means (15) for generating ozone from oxygen in the air flowing in from the air inflow port (16) in the air chamber (14), bacteria contained in the air flowing in from outside are killed in the air chamber (14) connected to the air intake port (13) by the excellent bacteria-killing action of the ozone. The entry of bacteria into the tank and a raw water container can be thus prevented at source by a simple structure.</p>
