An image forming apparatus capable of controlling movement of a transparent member suitably depending on various situations by including a transparent member, a feeding unit that feeds an original document to the transparent member, a reading unit that reads an image of the document fed on the transparent member via the transparent member, a moving unit that reciprocates the transparent member in a prescribed direction, and a controller that moves the transparent member forward in one direction from a home position while one document passes through a reading position, and stops the transparent member and then moves the transparent member backward to the home position when an interruption event of reading the document occurs.