To prevent the generation of white smoke by eliminating the carryover of water drips to obtain sufficiently dried air.

Spray water guiding bodies 20 for guiding spray water toward the side of filling bodies are arranged at the upper ends of the filling bodies B, constituted of dry passages 10 and wet passages 11, near an outside air intake port and an exhaust port in a direction crossing an outside air passage while the spray water guiding bodies 20 are constituted of a flat sheet member. The dry passages 10 are constituted of cap bodies 30, covering the upper ends of two sheets of filling plates 12 across the upper ends of the same.