Patent ID: 8849175

Claim:
An image forming apparatus having a duplex-printing mechanism, comprising: an apparatus body; an image forming unit disposed in the apparatus body and configured to form an image on a sheet; a drive mechanism disposed in the apparatus body; and a retransporting unit disposed in the apparatus body and having a retransporting path along which the sheet discharged from the image forming unit is transported toward an inlet port of the image forming unit, and the retransporting unit including: a transporting roller configured to transport the sheet transported in the retransporting path; an input portion disposed at a position upstream of the transporting roller in a retransporting direction in which the retransporting unit retransports the sheet, and configured to receive a drive force transmitted from the drive mechanism; a drive shaft extending in the retransporting direction, and configured to transmit the drive force, which is transmitted from the input portion, toward the transporting roller by rotating about an axis extending in the retransporting direction; a first guide configured to guide a sheet being retransported by the retransporting unit; and a second guide configured to further guide a sheet being retransported by the retransporting unit, the second guide provided at an end portion of the retransporting path in a width direction and having a guide surface extending along a direction of transport of the sheet, wherein the drive shaft and the input portion are disposed on an opposite side from the retransporting path with respect to the guide surface of the second guide such that the input portion overlaps with the guide surface of the second guide when viewed along the width direction.