PURPOSE: To output a key code string at a proper speed matching various states by outputting the key code string stored in a storage means at a regeneration speed set by a speed setting means.

CONSTITUTION: When the key codes are inputted in order by a key code input means 12 consisting of, for example, a JIS keyboard, those are stored in a storage means 12 composed of a magnetic disk, etc. A display means 13 displays the inputted data and the storage means 15 is stored with the key codes in pairs with elapsed times. The regeneration speed is set by the speed setting means 14 composed of a ten-key, etc., and a key code regenerating means 16 is used to regenerate the key codes as if the key codes were inputted from the key code input means 12, so that the regeneration intervals of the key code string can be varied.