To provide a cleaning device which can prevent a cleaning fluid from finding its way into a through hole when cleaning a coating roll with the through hole formed on both sides, and also efficiently clean the coating roll even when cleaning a large number of the rolls.

In order to clean the coating roll R with the through hole "h" formed on both sides, a small diameter part of a pair of tapered cone-shape insertion members 23 of a hard urethane rubber, is inserted fast into the through hole "h" of the roll R, and a lifter is made to descend by a vertically actuated cylinder unit and soaked into the cleaning fluid of a first cleaning tank 1 upto a position slightly below the through hole "h". After that, the roll R is ultrasonic-cleaned by emitting ultrasonic wave into the deaerated cleaning fluid with the help of an ultrasonic oscillator 30, while the roll R is made to revolve around a roll shaft through the insertion member 23 by a revolving motor. At the same time, both sides of the roll R are brush-cleaned using a revolving brush 27.