Image forming apparatus having multiple sheet feeding paths for double side processing

An image forming apparatus comprising:

• an image forming unit that forms an image on a recording material;
• a reading unit that reads an original sheet;
• a first original sheet conveyance path in which an original sheet fed from a feeding unit in which original sheets are stacked is conveyed;
• a second original sheet conveyance path in which the original sheet whose first and second sides are read by the reading unit is conveyed to a discharging unit that stacks discharged original sheets;
• a common conveyance path in which a recording material or the original sheet is conveyed so that an image is formed on a second side of the recording material in which an image is formed on a first side by the image forming unit, or the first side of the original sheet conveyed from the first original sheet conveyance path is read by the reading unit;
• a third original sheet conveyance path for conveying the original sheet conveyed in the second original sheet conveyance path to the common conveyance path, the third original sheet conveyance path connecting the first original sheet conveyance path and the second original sheet conveyance path;
• and
• a control unit that controls to convey the original sheet conveyed in the second original sheet conveyance path to the common conveyance path through the third original sheet conveyance path, and form an image on the original sheet by the image forming unit.