A cleaning device for use with an electrophotographic image forming
apparatus has a charging brush positioned in contact with an endless
image bearing surface of a rotatable image bearing member to form a
contact region in which the brush provides an electric charge with a
certain polarity to toner particles passing through the contact region
according to a rotation of the image bearing member, and a cleaning
member positioned on a downstream side with respect to a rotational
direction of the image bearing member and in contact with the image
bearing surface of the image bearing member to collect the toner
particles from the image bearing surface. The charging brush has a base
and a number of bristles planted in the base. A contact force of the
charging brush against the image bearing surface is set to be more than 0
N/m and equal to or less than 1.5 N/m.