To provide a method employed as both cleaning and dehydrating foam rubber capable of enhancing cleaning performance, moreover, serving as both cleaning function and dehydrating function, processing cleaning and dehydrating operation at the same time, and also capable of shortening and saving the working time.

In cleaning and dehydrating foam rubber 4 formed by pouring blended latex material at a predetermined temperature or lower, in addition, removed therefrom via a vulcanizing and rapping process, a centrifugal dehydrator with a cleaning nozzle 2 attached toward the inner part of a dehydrating drum 11 is used, and after the foam rubber is placed in the dehydrating drum 11, centrifugal dehydration is carried out while spouting cleaning liquid 7 from the nozzle 2.