A cleaning device, according to one embodiment, for cleaning a substrate by being rotated, includes: a cleaning member configured to clean a substrate; and a sleeve configured to be provided along a circumference of the cleaning member, a lower part of the sleeve being divided into a plurality of chucking claws each of which holds a portion of a side face of the cleaning member, wherein at inside of each of the plurality of chucking claws, a plurality of protrusions are provided substantially parallel to a rotation direction of the cleaning member, an end of each of the plurality of protrusions is configured to contact the side face of the cleaning member.