An image forming apparatus includes an apparatus body, an image forming unit, and a retransporting unit. The retransporting unit includes a transporting roller for applying a transporting force to the sheet and an input portion disposed at a position shifted upstream of the transporting roller in a retransporting direction. The input portion is configured to receive an input of a drive force supplied from the apparatus body. The retransporting unit further includes a drive shaft extending in a retransporting direction. The drive shaft is configured to transmit the drive force from the input portion toward the transporting roller by rotating about an axis thereof. A height of the image forming apparatus may be reduced by this configuration.