An image forming apparatus includes: a receiving portion that receives an authentication print job sent by a user; a comparison portion that compares identification information received through the user's input with identification information included in image data; a job execution portion that executes the authentication print job in the case where the comparison between the received identification information and the identification information included in the image data has succeeded; and a password storage portion that stores identification information in the case where the authentication print job is in the process of being received in order to enable the comparison made by the comparison portion with respect to the authentication print job that is being received.