To switch to a format corresponding to an entry sheet just by the operation of turning the entry sheet every time writing to the entry sheet for one page is ended even without performing the operation of selecting the format corresponding to the entry sheet in the state of binding the entry sheets of the slips or the like of different kinds and piling them up on a tablet.

The slip formats are stored in a storage device 3 for the respective plural sheets of the slips for which a handwriting entry column is formed corresponding to a predetermined order. At the time of binding the plural sheets of the slips and piling them up on the tablet 7, a form page read part 8 detects of which page the slip on a front side is. Corresponding to the detected result, a CPU 1 reads the slip format of the corresponding page and switches the format.