An image forming apparatus displays preview images representing respective images to be formed on a front side and a back side of paper P. The image forming apparatus includes a display, a display section, a receiving section, and an instruction section. The display section causes the display to display a front-side preview image representing a front-side image to be formed on the front side of the paper. The receiving section receives a specific operation. The instruction section forms the front-side image on the front side of the paper and forms a back-side image on the back side of the paper. When the receiving section receives the specific operation, the display section causes the display to display a back-side preview image representing the back-side image as seen from the front side of the paper through the paper.