PURPOSE: To automatize a duplicating operation by controlling a projecting mechanism so that a previously set magnification may be obtained corresponding to the original film of a supplied cassette and a position varying mechanism so that a film table and a light source may be at previously set relative positions.

CONSTITUTION: The order of the supplied cassette 14, projecting magnification and a layout position, etc., on an unexposed film 12 are inputted in a control means 20 as data. Based on the data, the control means 20 drives a cassette feeder 18 so as to successively supply the cassette 14 to an original setting part 15, drives a projection mechanism to obtain the desired magnification and drives the position varying mechanism 19 to set a projecting position. As the result, even when the original film of the cassette 14 is laid out on the unexposed film 12 in order, it is printed at the desired magnification. Thus, the desired duplicated original is automatically obtained.