PURPOSE: To simplify a structure by moving simultaneously a copying lens and a mirror by one driving source, and moving them on a plane parallel to the mirror and the copying lens by a cam and a large pulley which are provided coaxially.

CONSTITUTION: When a magnification designating key is depressed, a rotational direction of a motor 52 is decided, and it is rotated at a constant speed. The rotation of the motor 52 is transferred to a cam 47 through a belt 51, transferred to a large pulley 46 through a revolving shaft 45, and moved to a belt 39. When the cam 47 rotates, a mirror base 25 ascends or descends along guide bars 26, 27. Also, when the belt 39 moves, a lens base also moves along the guide bars 26, 27, and a moving base 33 is moved in the lateral direction along guide bars 31, 32. When the lens base 30 moves, if a tact 63 conforms with a sensor 62, the motor 52 stops, a stopper 55 goes into a V-groove, therefore, the cam 47 stops at a prescribed rotating position. In this case, mirrors 11, 12 attached to the mirror base 25 and a copying lens 15 attached to the lens base 30 are positioned at a prescribed magnification position.