There is disclosed an image reading apparatus which comprises a document feeder, a reading unit, and a guide device. The document feeder includes a feeder roller and feeds a document sheet with an image thereon, along an outer circumferential surface of the feeder roller. The reading unit has a reading surface opposed to the outer circumferential surface of the feeder roller, and reads, at a reading position, the image on the document sheet being fed. The guide device has a guide surface, and is disposed to be opposed to the reading surface of the reading unit, so as to guide the document sheet along the guide surface to the reading position. The outer circumferential surface of the feeder roller, and at least an opposed portion of the guide surface at which the guide surface is opposed to the reading surface, have a substantially same color.