To easily retrieve a vehicle travel record decided by a regulation item and to precisely and minutely retrieve speed by individual time bands and the travel record by retrieving the travel records of preceding and subsequent dates by means of comparing them with the date of the displayed travel record.

When a user moves retrieval 1 (320) to one prescribed point for minutely retrieving a travel record graph displayed on a travel situation display part 310, a PC displays the travel date/time, the travel speed and the travel distance at the prescribed point where retrieval 1 (320) is positioned in a 'date/time' area 301, a 'speed' area 302 and a 'distance' area 303 in a simple information display part 300. Thus, time when a retrieval vehicle is accelerated, the speed and distance can minutely be recognized. When the user selects selection 1 (330) or selection 2 (340), the PC retrieves a travel record preserved in the previous or subsequent date with the date that is retrieved and displayed at present as the reference and it is displayed on an initial picture. Thus, the PC displays the speed excess items of the retrieval vehicle by individual date/time, for example.