Image forming apparatus, image forming method, and secondary transfer unit

An image forming apparatus includes an image transfer section configured to transfer a reversed image based on a read original image onto an image carrier as a toner image, a secondary transfer roller configured to come into contact with the image carrier and transfer the toner image onto a recording medium, a secondary transfer roller housing section configured to house the secondary transfer roller, a lubricant coating brush configured to come into contact with the secondary transfer roller and coat lubricant on the secondary transfer roller, a lubricant coating brush housing section configured to house the lubricant coating brush and be movable along a groove formed on the secondary transfer roller housing section, a solid lubricant configured to be housed in the lubricant coating brush housing section and supply lubricant to the lubricant coating brush, and a lubricant holding member configured to elastically hold the solid lubricant.