SOFTWARE UPDATING APPARATUS, VEHICLE, AND SOFTWARE UPDATING METHOD

A software updating apparatus includes an update control section that performs a software update for each of a plurality of electronic control units mounted in a vehicle, by using new versions of software supplied via a network, and an update mode determining section that selectively determines an update mode used when performing the software update, from among a parallel update mode and a serial update mode. The update control section performs the software update for each of the plurality of electronic control units based on the update mode determined by the update mode determining section.