Image reading apparatus and image forming apparatus

An image reading apparatus comprising:

• a support portion configured to support a second surface of a sheet with an image formed on a first surface of the sheet in a conveyance path where the sheet is conveyed;
• a reading unit disposed on one side opposite to another side on which the support portion is disposed across the conveyance path, and configured to read the first surface of the sheet conveyed in the conveyance path;
• a first movable unit configured to move the reading unit in a second direction, where a conveyance direction in which the sheet is conveyed in the conveyance path is defined as a first direction, a width direction of the first surface of the sheet orthogonal to the first direction is defined as the second direction, and a direction orthogonal to the first direction and the second direction is defined as a third direction;
• and
• a rotatable portion configured to rotate the reading unit about a first rotation shaft,
• wherein the first movable unit is configured to move the reading unit between a first position and a second position,
• wherein the first position is a position where a reading surface of the reading unit and the support portion face each other, and the second position is a position where the reading surface of the reading unit and the support portion do not face each other,
• wherein the rotatable portion is configured to rotate the reading unit located at the second position to an inclined position where the reading surface is inclined by a predetermined angle.