A frame memory for extending data of an picture demonstrated on an picture display device is effectively utilized to effect the printing of an picture demonstrated on the picture display device inexpensively and appropriately. To this end, there is provided a printing data creating unit 26 for acquiring data of the picture demonstrated on a display monitor 30 from a frame memory 22 which holds the data from frame to frame. The printing data creating unit 26 prepares data for printing based on the so-acquired data.