Image reading apparatus and opening/closing apparatus

An image reading apparatus comprising:

• a lower unit that includes a reader that reads a document;
• a discharge tray that is a pivoting body configured to, by pivoting with respect to the lower unit, take a closed state and an open state in which the discharge tray is more separated from the lower unit than in the closed state, and on which documents scanned and discharged are stacked;
• an upper unit that is a pivoting body configured to, by pivoting with respect to the lower unit, take a closed state in which the upper unit is located between the lower unit and the discharge tray and an open state in which the upper unit is more separated from the lower unit than in the closed state, and that forms a document transport path with the lower unit between the upper unit and the lower unit;
• a first damping portion that damps pivoting of the discharge tray in at least an opening direction;
• and
• a second damping portion that damps pivoting of the upper unit in at least a closing direction, wherein
• an axis center of a first pivot shaft that is a pivot shaft of the discharge tray and an axis center of a second pivot shaft that is a pivot shaft of the upper unit are common,
• the upper unit is configured to engage with the first damping portion, and
• when the upper unit is closed from a state in which at least the discharge tray and the upper unit are opened, a damping force of the first damping portion is applied to the upper unit in addition to a damping force of the second damping portion.