To provide a spray drier capable of enhancing an output of a slurry without enlarging the diameter, increasing the rotation speed of a rotary disk nor increasing the capacity of a chamber.

In the spray drier obtained by arranging in a freely rotatable manner the rotary disk in the chamber 2 and insert-arranging a slurry feeding pipe 12 for feeding slurry S to the rotary disk so as to atomize the slurry S fed from the pipe 12 into the chamber 2 with the centrifugal force of the rotary disk, the first to the third rotary disks 15 to 17 are arranged by plural stages at prescribed intervals.