Image reading apparatus capable of shielding illumination light not to leak outside

An image reading apparatus comprising:

• a main body on whose upper surface, contact glass is provided, the main body having, inside thereof, an image obtaining portion configured to irradiate illumination light from downward, via the contact glass, on a document placed on the contact glass and capture, from downward, an image formed on the document;
• a document pressing plate attached to the main body in such a way as to pivot in a vertical direction around a pivot shaft that is provided on a rear side above the upper surface, the document pressing plate being configured to press downward the document placed on the contact glass;
• a support attached to the main body so as to protrude upward from the main body, and configured to move in an up-down direction with respect to the main body, wherein the pivot shaft is provided in the support;
• and
• a sheet-like light shield configured to, when the document pressing plate presses downward the document placed on the contact glass, extend downward from the document pressing plate with increase of an interval between the document pressing plate and the upper surface on the rear side in the up-down direction.