PURPOSE: To attain the transmission of an original printed with both faces and the high speed of copy print by providing two image sensors reading exclusively the front side and the rear side of an original respectively, storing one picture signal, selecting the picture signal and other signal with a switch and outputting the selected signal.

CONSTITUTION: Two contact image sensors reading the front side and the rear side independently are provided in an original scanning section 11, and the picture information on the front side of the original is sent sequentially through a path to a communication control section 16 from an original scanning section 11. On the other hand, the picture information on the rear side of the original is sequentially stored from the original scanning section 11 to a frame memory 12. When the transmission of the picture information of the front side is finished attended with the end of the scanning of the original, the control section 17 throws the switch 13 to the position of the frame memory and the picture signal on the rear side is outputted sequentially from the frame memory 12 and sent from a communication control section 16. When the transmission of the rear side is finished, the control section 17 throws the switch 13 again to the original scanning section 11 to prepare the transmission of the succeeding original. Then the transmission and copy of the original printed on both sides are implemented simultaneously.