Provided as display portions configured to display maintenance related information pieces about a plurality of maintenance items of a vehicle are: a first display portion configured to, when at least one of the plurality of maintenance items is in a predetermined maintenance period, display the maintenance related information piece about the maintenance item that is in the predetermined maintenance period, the predetermined maintenance period including a predetermined maintenance timing and periods before and after the predetermined maintenance timing; and a second display portion configured to, when none of the plurality of maintenance items is in the maintenance period, display only the information piece about a nearest one of the maintenance timings of the plurality of maintenance items.