A vehicle information processing system 100 conducts wireless communications between a preceding vehicle 200 and a succeeding vehicle 201, and exhibits information on a winker operation of the preceding vehicle 200 to a driver of the succeeding vehicle 201, and includes vehicle-mounted apparatuses 1 in the preceding and succeeding vehicles, of which one 1 in the preceding vehicle 200 wirelessly transmits information on a winker operation of the preceding vehicle, and the other 1 in the succeed vehicle 201 receives the wirelessly transmitted information on the winker state, and exhibits same to a driver of the succeeding vehicle 201, while the apparatus 1 in the succeeding vehicle 201 estimates a relationship between the preceding vehicle 200 and the succeeding vehicle 201, judges whether an exhibition liming of the information on the winker state is to be hastened or delayed based on an estimation result, and exhibits the information on the winker state at the judged timing.