Provision or non-provision of partitions is changeable in correspondence with the presence or absence of occupants in a vehicle. A partition opening/closing system is provided with a partition opening/closing determination unit and a partition drive unit. The partition drive unit is a drive device that drives opening and closing of partitions. Partitions are opened and closed between a plurality of seats provided in the vehicle. The partition opening/closing determination unit is a control unit that determines the necessity for opening/closing of partitions. Information indicating at least one of scheduled boarding and scheduled alighting of the vehicle by occupants is used in this determination.