Abstract: A terminal input apparatus includes a portable input device having a data input key and a main device provided with a holder for holding the portable input device therein. The holder has a main device side connector which is to be connected to a connector arranged in the lower portion of the portable input device. The holder is arranged so that the holder can be moved relative to the main device between a storing position (at which the stored portable input device is parallel to the main device) and an extraction position (at which the portable input device insertion opening of the holder is projected toward the operation face of the main device, and the portable input device is inclined relative to the main device).