PURPOSE: To limit and display directly the copying possible area on a platen glass surface placing an original by providing a display member for displaying the copying possible area, so as to be movable under the platen glass.

CONSTITUTION: An operation of a copying possible area is executed by a CPU16. Its result is supplied as a moving step of each motor 7, 13 to a driving part 17, and two sheets 2, 8 are moved by a prescribed quantity by each motor 7, 13. The copying possible area corresponding to a selected copy paper size and magnification can be displayed directly and automatically on a platen glass 1 as shown by A. In such a way, since the copying possible area is displayed directly on the platen glass 1, its size can be confirmed easily, the device can be very easily, and the generation of a miscopy can be prevented.