Image reading apparatus

An image reading apparatus comprising:

• an apparatus main body including a feeding unit for feeding a sheet;
• a first reading sensor provided in a first reading unit and configured to read one surface of the sheet moving along a conveyance path;
• a second reading sensor provided in a second reading unit provided to face the first reading sensor via the conveyance path and configured to read an image on the other surface of the sheet;
• a first background portion provided at a readable position of the first reading sensor and serving as a reading background of the first reading sensor;
• a second background portion provided at a readable position of the second reading sensor and serving as a reading background of the second reading sensor;
• a third background portion which is opposite to the second reading sensor in the direction parallel to the conveyance path with respect to the first background portion;
• and
• a moving portion configured to integrally move the first reading sensor and the second background portion along the conveyance path,
• wherein the first reading unit includes a sensor case in which the first reading sensor is provided, and the sensor case is fixed to the apparatus main body,
• wherein the first reading sensor is able to move between a position where the first reading sensor faces to the first background portion and receives reflection light from the first background portion and a positon where a black background portion which does not have surface reflecting light to the first reading sensor is placed, and
• wherein the third background portion has an inclined surface on the first background portion side, and wherein a position of the black background is a position where the first reading unit faces to the inclined surface.