Patent ID: 8849139

Claim:
An image forming apparatus, comprising: a movable image bearing member; a toner image forming portion configured to form a toner image on the image bearing member according to image data; a transfer member configured to form a transfer portion by being pressed against the image bearing member, and transfer the toner image on the image bearing member to a recording material at the transfer portion; a position changing portion configured to change a position of the toner image to be formed on the image bearing member in a width direction orthogonal to a moving direction of the image bearing member and a position in the width direction of the recording material to be conveyed to the transfer portion; a cleaning member configured to clean toner adhering to the transfer member; an execution portion configured to execute a marginless print mode of forming the toner image on the recording material without providing a margin by forming the toner image extending from a first region of the image bearing member corresponding to a position outside one end portion of the recording material in the width direction to a second region of the image bearing member corresponding to a position outside the other end portion of the recording material in the width direction; and a control portion configured to control the position changing portion, in a case where the execution portion continuously executes the marginless print mode, to change both the position of the toner image and the position of the recording material in the width direction to be used for performing subsequent image formation toward the first region, an integrated value of an image data amount in the first region being smaller than an integrated value of an image data amount in the second region with respect to the toner image obtained in image formation before the subsequent image formation, so that a change amount of the position of the toner image becomes the same as a change amount of the position of the recording material.