Patent ID: 8626014

Claim:
An image forming apparatus comprising: an image bearing member configured to bear a toner image; a movable belt member configured to bear and convey a recording material; a transfer member configured to electrostatically transfer the toner image formed on the image bearing member onto the recording material born and conveyed by the belt member; a push-up member having a plurality of protrusions in a width direction of the belt member and configured to push up, from an inner side, the belt member downstream of the transfer member in a conveying direction of the recording material so that the plurality of protrusions forms a plurality of protruded portions on the belt member in a thickness direction of the belt member; an execution portion configured to execute a first mode in which the plurality of protrusions of the push-up member forms a plurality of protruded portions in a width direction of the belt member by pushing up the belt member and a second mode in which the plurality of protrusions of the push-up member is separated from the belt member; a control portion configured to execute the first mode in case that a recording material having a first stiffness is conveyed by the belt member, and to execute the second mode in case that a recording material having a second stiffness larger than the first stiffness is conveyed by the belt member.