To provide a printer for enabling various impositions of image data of a printing object in the case of coupling print jobs to print the coupled print jobs, an information processor and a printing system.

The printer of this invention includes storage means for storing print data and attribute information of the print data, and print processing means for printing the print data according to a job ticket. When coupling print is instructed by the job ticket, print data received together with the job ticket and the print data stored in the storage means are alternately printed.