To provide a cooling tower capable of facilitating cleaning of a lower water tank and significantly reducing falling sound of water flowing down from a filler.

In the cooling tower adapted to spray water to the filler 2 arranged within a tower body 1 to bring the water with the outside air taken into the tower body 1 and receive cooling water flowing down along the filler 2 in the lower water tank 4, a water collecting tank 10 is arranged just under the filler 2, and the water collecting tank 10 includes a water conduit 15 extending into the lower water tank 4.