The image forming apparatus includes an image forming unit, a reading unit, first and second original sheet conveyance paths, a common conveyance path in which a recording material or the original sheet is conveyed to form an image, a third original sheet conveyance path that connects the first original sheet conveyance path and the second original sheet conveyance path and is used for conveying the original sheet conveyed in the second original sheet conveyance path to the common conveyance path, and a control unit that controls so as to convey the original sheet conveyed in the second original sheet conveyance path to the common conveyance path via the third original sheet conveyance path, and form an image on the original sheet.