A printer apparatus is provided which receives concurrent input print data from plural input ports without increasing receiving buffer memory. 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 print data stored in the buffer memory is printed 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 is printed when the image creating device becomes available.