An image forming apparatus includes an input device, an image forming device, and a control device. The control device includes a processor, and acts, when the processor executes a control program, as a controller that, upon receipt of an instruction to form a source document image on a first face of a plurality of recording media through the input device, causes the image forming device to form the source document image on the first face of the plurality of recording media, designates a recording medium on which a see-through prevention image, constituted of a predetermined pattern, is to be formed, out of the plurality of recording media, and causes the image forming device to form the see-through prevention image only on a second face, opposite to the first face, of the recording medium designated.