PURPOSE: To omit a handwriting process of a discriminating information by loading an ID card to an identification mark printer which displays the discriminating information and printing it on an X-ray film for recording and reading the information on the ID card to print it on the film.

CONSTITUTION: When an ID card 1 is set to a magnetic record collector 2, the information on a magnetic matter 1a is read by a magnetic head 2a. This read signal is sent to a control circuit 3 and converted into a picture signal. A liquid crystal display panel 4 receives the picture signal from the circuit 3 and displays the discrimination mark in the form of a visible image. Then the mark is printed and recorded on an X-ray film by the light sent from a generating part 5.