A data processing device comprising: a storage unit storing therein a correspondence table in which biometric data pieces are associated one-to-one with different jobs, the biometric data pieces pertaining to respective fingers of a user; a display unit; a designation unit operable to, in accordance with a user operation, designate a target data piece from among data pieces being displayed on the display unit; a generation unit operable to generate a biometric data piece by reading a biometric information piece of a finger of the user; and an execution unit operable to execute one of the different jobs that is associated with one of the stored biometric data pieces that matches the generated biometric data piece by using the target data piece as data input by the user with respect to the one of the different jobs.