Image reading device and image forming apparatus including the same

An image reading device comprising:

• an image reader that scans a document so as to read an image of the document,
• the image reader including
• a scanning body in which at least a plurality of mirrors, a condenser lens, and an image sensor are disposed, wherein
• the scanning body, concerning positional relationships among the plurality of mirrors as viewed from a main scanning direction, the plurality of mirrors are disposed on two sides with respect to an imaginary line extending along an optical axis of reflected light from the document, and
• a plurality of the mirrors on a corresponding one of the two sides are disposed such that a reflecting position of a mirror on a downstream side in a traveling direction of the reflected light is positioned closer to the document and also to the imaginary line than a reflecting position of a mirror on an upstream side in the traveling direction of the reflected light.