An image forming apparatus is provided with a storage portion that stores a plurality of pieces of schedule information, an image reading portion that generates image data of an original document including a plurality of description fields, a printing portion, and a control portion that recognizes a plurality of description field regions corresponding to the plurality of description fields, respectively, recognizes in-field information that is included in each of the plurality of description field regions in association with a date borne by a corresponding one of the plurality of description fields, extracts one of the plurality of pieces of schedule information and a piece of the in-field information which correspond to a common date as first subject information and second subject information, respectively, and performs control so that an update information image is printed.