Image-forming apparatus

An image-forming apparatus for forming an image on a recording medium comprising:

• an image carrier for carrying a toner image corresponding to an image to be formed on the recording medium;
• a cleaning device comprising a cleaning member for removing residual toner remaining on an image-carrying face of the image carrier by contacting the image-carrying face while rotating;
• and
• a bias-applying unit for switching between a first bias for removing residual toner remaining on the image-carrying face of the image carrier by electrostatic force from the image carrier such that the cleaning member captures the residual toner, and a second bias for expelling residual toner captured by the cleaning member by electrostatic force from the cleaning member toward the image carrier, and for applying the first or the second bias between the image carrier and the cleaning member,
• the polarities of the first bias and the second bias being the same, and the value of the second bias being greater than the value of the first bias.