The purpose of this invention is to provide a printer apparatus capable of receiving concurrent input print data from plural input ports without increasing receiving buffer memory and image creator. A controller determines whether an image creator is used by other jobs when starting receiving print data through any one of the plural input ports. When not used, print data related to the current job is stored in a receiving buffer memory and at the same time create print data stored in the buffer memory via the image creator. On the other hand, when other jobs use the image creator, the print data related to the current job is stored in a hard disk unit and then is created the print data stored in the hard disk unit when the image creating device becomes available.