PURPOSE: To provide a scrub washer which can reduce the re-adhesion of particles to a surface to be washed and shorten time for washing.

CONSTITUTION: In a scrub washer, washing liquid is supplied to washing bristles with a washing brush 1 rotated, and a surface to be washed is contacted with the end parts of the bristles for washing. In the plantation of washing bristles onto the brush 1, by making the plantation density in an area A on the rotational center P side of the brush 1 lower than that in the outside area B, the total number of particles which stick to the washing bristles to stay behind can be reduced in the area A on the side of the rotational center.