To make a cooling tower smaller in size without reduction in cooling capacity.

A distributer 83 is provided below water spray ports 821 of a water spray pipe 82, a plate-shaped member 833 is provided immediately below a ridge portion 831 of a roof section 832 on the distributer 83, and guide grooves 834 are formed on the plate-shaped member 833 to permit insertion of cooling heat radiation plates 84 in the plate-shaped member 833. Ends of the cooling heat radiation plates 84 are inserted into the guide grooves 834 with a lower end of the roof section 832 contacted with the lower ends of the cooling heat radiation plates 84. Spacings between the ends of the respective cooling heat radiation plates 84 can be regulated to become constant. A cooling water flowing down from the water spray ports 821 is divided by the ridge portion 831 of the distributer 83 to flow diverging at the roof section 832 to move from the lower end of the roof section 832 to the ends of the cooling heat radiation plates 84. The cooling water surely shifts to the cooling heat radiation plates 84 and does not fall down between the cooling heat radiation plates 84, whereby a cooling effect of the cooling water can be ensured.