AUXILIARY KEYBOARD INPUT DEVICE, AND INFORMATION PROCESSOR CAPABLE OF MOUNTING THE SAME

PROBLEM TO BE SOLVED: To provide an auxiliary keyboard input device whose portability can be prevented from being largely damaged when it is mounted on an information processor constituted of the minimum number of input keys and is used and the information processor on which the auxiliary device can be mounted. SOLUTION: An auxiliary keyboard input device 1 which can be mounted on the information processor 2 having a key input part 22 for character input so as to be freely attachable/detachable is provided with an auxiliary keyboard input part 12 for keyboard input, and the input by the auxiliary keyboard input part 12 is combined with the input by the key input part 22 of the information processor 2 so that desired characters can be inputted by a portable telephone 2.