A printer comprising: a conveyance route; an image former configured to form an image on a recording medium being conveyed along the conveyance route; a first conveyor configured to convey the recording medium during image formation by the image former along the conveyance route at a first conveyance speed based on a print condition of the image formation by the image former ; a second conveyor configured to convey the recording medium along the conveyance route at a second conveyance speed higher than the first conveyance speed; a third conveyor arranged between the first conveyor and the second conveyor on the conveyance route and configured to convey the recording medium along the conveyance route, the third conveyor being configured to, from operating at the first conveyance speed, start acceleration of the recording medium after a recording region trailing end of the recording medium passes the image former and accelerate the recording medium such that a speed of the recording medium increases to the second conveyance speed not later than a time point when a leading edge of the recording medium reaches the second conveyor ; and a drive controller configured to control a timing at which the third conveyor starts the acceleration, characterized in that the third conveyor comprises: a first acceleration conveyance driver ; a second acceleration conveyance driver located downstream of the first acceleration conveyance driver on the conveyance route; and a third acceleration conveyance driver located downstream of the second acceleration conveyance driver on the conveyance route, and the drive controller is configured to control a timing at which each of the first, second, and third acceleration conveyance drivers of the third conveyor is driven to start the acceleration of the recording medium. a conveyance route; an image former configured to form an image on a recording medium being conveyed along the conveyance route; a first conveyor configured to convey the recording medium during image formation by the image former along the conveyance route at a first conveyance speed based on a print condition of the image formation by the image former ; a second conveyor configured to convey the recording medium along the conveyance route at a second conveyance speed higher than the first conveyance speed; a third conveyor arranged between the first conveyor and the second conveyor on the conveyance route and configured to convey the recording medium along the conveyance route, the third conveyor being configured to, from operating at the first conveyance speed, start acceleration of the recording medium after a recording region trailing end of the recording medium passes the image former and accelerate the recording medium such that a speed of the recording medium increases to the second conveyance speed not later than a time point when a leading edge of the recording medium reaches the second conveyor ; and a drive controller configured to control a timing at which the third conveyor starts the acceleration, characterized in that the third conveyor comprises: a first acceleration conveyance driver ; a second acceleration conveyance driver located downstream of the first acceleration conveyance driver on the conveyance route; and a first acceleration conveyance driver ; a second acceleration conveyance driver located downstream of the first acceleration conveyance driver on the conveyance route; and a third acceleration conveyance driver located downstream of the second acceleration conveyance driver on the conveyance route, and the drive controller is configured to control a timing at which each of the first, second, and third acceleration conveyance drivers of the third conveyor is driven to start the acceleration of the recording medium. <EOS>