PURPOSE: To display program information of a small module on one screen by the easy operation, by constituting the titled device so that a program input can be executed from a cursor position which is set to an arbitrary position on a program text display part.

CONSTITUTION: In accordance with an instruction of the program input of an input device 2, a program input means 6 inputs a program. This program is related to the position where a cursor display means 5 has displayed a cursor, and stored in a program storage means 7. Also, a program text display means 8 for displaying the program stored in the means 7, on a display 1 is provided so that the program can always be displayed at the cursor position. Also, such a device is provided with a cursor position automatic moving means 9 for moving the cursor to the rear of a program text, based on a display state of the means 8, and executing a line feed by making line heads of the program in accordance with an instruction of a line feed of the device 2. In such a way, the program line heads are made uniform, and the cursor is moved to the next line.