To provide a sand classifying-conveying-dehydrating device capable of continuously providing classified sand to a dehydration process, which significantly improves a working efficiency and decreases a space for installing the device.

This is a device for recovering sand from a material including water and sand, comprising: a classifier 100 for transferring the sand contained in the material from upstream to downstream; a dehydrator 300 for removing the water contained in the sand; and a conveyor 200 for delivering the sand from the classifier to the dehydrator, wherein the classifier, the conveyor and the dehydrator are integrally connected in sequence from upstream to downstream.