PURPOSE: To make punching for filing simple and efficient by enabling marks which will be a measure for positioning at the time of punching holes for filing to be printed irrespective of the contents of displays.

CONSTITUTION: The head position (a) which indicates the current head position is known by measuring the movement of the head with a counter or the like. If the mark A information generating circuit 13 out of A, B mark information generating circuits 13, 14 is selected and set with an assignment switch 15, a coincidence circuit 16 operates when the printing head comes to the A point, than a printing part 12 is operated by the output signal from a coincidence circuit 16 and the mark A is printed. 10 denotes a diaplay device and 11 a printing control circuit.