A taxi system includes: a plurality of taxi vehicles that each transport a user to a destination by automatic driving; and a management center, in which the management center, when a prescribed protection condition is satisfied, instructs one or more unmanned taxi vehicles to execute the protection traveling that is traveling while protecting a manned taxi group including one or more manned taxi vehicles, and the unmanned taxi vehicle, when having received an execution instruction of the protection traveling, protects the manned taxi group by traveling adjacently to the manned taxi group in a front-rear direction.