An image formation device includes an image-bearing body that rotates, a
charging roller that contacts the image-bearing body and is rotated by
the rotation of the image-bearing body, and charges the image-bearing
body, a cleaning roller that contacts the charging roller and is rotated
by the rotation of the charging roller, and cleans the charging roller,
and a first auxiliary roller that is provided coaxially with the charging
roller, contacts the image-bearing body and is rotated by the rotation of
the image-bearing body. The image formation device satisfies the
following relation: F1>F2>F3 where F1 represents a friction force
between the first auxiliary roller and the image-bearing body, F2
represents a friction force between the image-bearing body and the
charging roller and F3 represents a friction force between the charging
roller and the cleaning roller.