To facilitate the confirmation of inputted data and data of an information source by overlapping a transmission-type liquid crystal display part on the input information source.

The transmission-type liquid crystal display device 2 is pulled out from the upper part of a handy terminal 1. The handy terminal 1 is placed so that numeric value data 5 of a slip where a sum and quantity, which are to be inputted, are filled is overlapped with the display position of the number 4 of the pulled out liquid crystal display device 2. Since the input frame of an input digit number position which is to be inputted in the liquid crystal display device 2 flickers and a number equivalent to the stop position of a sliding switch 6 as a numeric value-only input device is displayed on the display position of the number 4 in the liquid crystal display device 2, the sliding switch 6 is moved until the number becomes the same as the number shown in the slip 3. The sliding switch 6 is moved and stopped until the number 5 displayed on the slip 3 becomes the same as the inputted number. Since the sliding switch 6 becomes a pressing key switch, and one digit becomes definite by depressing the key.