A control apparatus provided with first and second control devices, and configured to execute vehicle control and to execute update processing for updating a vehicle control software that is to be used for the vehicle control. The control apparatus includes: a first storage device included in the first control device and configured to store therein the vehicle control software; a second storage device included in the second control device and configured to store therein a new software to which the vehicle control software is to be updated; an update processing portion configured to execute the update processing for updating the vehicle control software by writing the new software stored in the second storage device, into the first storage device; and a backup processing portion configured, prior to the update processing by the update processing portion, to write the vehicle control software into the second storage device.