An intermediate transfer unit includes first to third movement controllers. When a first image carrier is used, the first movement controller moves a first moving member to a first position. When the first image carrier is not used, the first movement controller moves the first moving member to a second position. When second image carriers are used, the third movement controller moves a third moving member to a fifth position. When the second image carriers are not used, the third movement controller moves the third moving member to a sixth position. When any of the first and second image carriers is used, the second movement controller moves a second moving member to a third position. When the first and second image carriers are not used, the second movement controller moves the second moving member to a fourth position.