Image reading apparatus and image forming system

An image reading apparatus for reading image information of a sheet discharged from an image forming apparatus, the image reading apparatus comprising:

• an image reading sensor configured to read image information of a first surface of the sheet at a reading position;
• a transparent plate provided opposed to the image reading sensor and having a light transmission property;
• a guiding member provided opposed to the image reading sensor in a state in which a gap is formed between itself and the transparent plate on a side opposite from the image reading sensor with respect to the transparent plate;
• a first roller pair provided upstream of and adjacent to the transparent plate with respect to a sheet feeding direction, the first roller pair being configured to feed the sheet toward the reading position;
• a second roller pair provided upstream of and adjacent to the first roller pair with respect to the sheet feeding direction, the second roller pair being configured to feed the sheet toward the reading position;
• a first driving unit including a first motor and a first toothed belt configured to transmit a driving force of the first motor to the first roller pair;
• and
• a second driving unit including a second motor and a second toothed belt configured to transmit a driving force of the second motor to the second roller pair,
• wherein the first roller pair and the second roller pair are disposed so as to nip the sheet in each of nips of the first roller pair and the second roller pair when a leading end of the sheet enters between the guiding member and the transparent plate.