A travel environment information collecting device mounted on a vehicle comprises a collecting means (12) which collects travel environment information of a road on which the vehicle concerned is travelling, a receiver means (14) which receives travel environment information being transmitted from an information center which stores an advance travel environment information, a judgement means which judges whether a processing of updating or new generation for a part of the received travel environment information is necessary by making use the collected travel environment information; and a transmitting means (13) which transmits the travel environment information collected by the collecting means and to be used for the concerned processing to the information center when the judgement means judges that either the updating processing or the new generation processing is necessary.