To provide a printer capable of improving correction value print on printing material and working efficiency in reprinting and an information setting method.

The printer 10 is a device for forming an image on the front surface of photographic printing paper 38 and performing the correction value print on the back surface thereof and is equipped with an input part 36 for setting correction value print information to be formed on the paper 38, a display part 32 for displaying the set correction value print information and a print unit 48 for forming the set correction value print information on the back surface of the paper 38. The set correction value print information is displayed on the display part 32 before it is formed on the paper 38.