In an image forming apparatus, an arithmetic processing device functioning as a profile manager executes profile update processing: (a) by selecting one of a plurality of sheet types as a reference sheet type, allowing a printing device to print a colorimetric patch on a printing sheet of the reference sheet type to create an adjustment chart, generating a profile on the printing sheet of the reference sheet type based on a colorimetric result of the colorimetric patch, and updating the profile on the printing sheet of the reference sheet type stored in a storage device with the generated profile; and (b) by selecting each of the remaining sheet types as a target sheet type and calibrating the profile on a printing sheet of the target sheet type stored in the storage device, based on respective correspondence relation characteristics before and after the profile on the reference sheet type is updated.