A portable electronic information device with superb portability and/or amusement value is provided. This device A is a portable electronic information device A having an external housing 1 that can be equipped in a car, and the device A is provided with expression means 7, 8 and 9 for performing actions that can be sensed by the user of the vehicle, in accordance with vehicle status information of the vehicle or output signals from sensors 4 or 5 equipped inside external housing 1, and thus delivers superb amusement value. This device also functions as a vehicle key, providing high portability, and enabling information to be shared with a home computer, thus providing a high level of convenience.