An image forming apparatus includes a waste toner container installed removably in an apparatus body through an opening and collecting a waste toner discharged from an image forming section in which an image is formed with toner, and an opening/closing cover supported at an edge of the opening and pivoting about an axis line extending in a specific direction, the opening/closing cover pivoting about the axis line and moving between a closed position to close the opening and an open position to open the opening. The waste toner container has an engaged part, and the opening/closing cover has an engaging part that engages with the engaged part. The engaging part engages with the engaged part in the closed position to hold the opening/closing cover in the closed position when the waste toner container is installed in the apparatus body.