In order to reduce the number of times of authentication when printing data stored in a server is printed, an MFP includes: a printing data receiving portion to receive printing data from a server; a job executing portion to execute a job; a user authenticating portion; a job generating portion to generate a reserved job to form an image of printing data associated with the authenticated user; a suspending portion to temporarily prohibit the reserved job from being executed; a job identification information issuing portion to issue job identification information; a transmission demanding portion to transmit to the printing server a printing data transmission demand that demands transmission of the printing data and contains the job identification information; and a releasing portion to release the prohibition of execution of the reserved job when the printing data received in response to transmission of the printing data transmission demand is received together with the same job identification information as the reserved job.