Medium discharge device and image reading apparatus

A medium discharge device comprising:

• a discharge roller pair configured to discharge a medium in a discharge direction;
• a roller drive section configured to drive rollers configuring the discharge roller pair;
• a discharge tray including a placement surface on which the medium discharged from the discharge roller pair is placed, the discharge tray changing a placement angle in the discharge direction of the placement surface;
• a placement angle changing section configured to change the placement angle of the discharge tray;
• and
• a control section configured to control operations of the roller drive section and the placement angle changing section, wherein
• the discharge tray changes, with the placement angle changing section, the placement angle to a first placement angle and a second placement angle larger than the first placement angle,
• the discharge roller pair changes, with the roller drive section, discharge speed to first discharge speed, second discharge speed lower than the first discharge speed, and third discharge speed lower than the second discharge speed, and
• the control section changes the discharge speed from the first discharge speed to the second discharge speed while the medium is discharged at the second placement angle, changes the discharge speed from the first discharge speed to the third discharge speed while the medium is discharged at the first placement angle, and discharges the medium.