A control device of a vehicle includes an electronic control unit configured to selectively execute a first operation control for traveling based on a driving operation of a driver and a second operation control for traveling by setting a target traveling state independently of the driving operation of the driver and automatically performing acceleration or deceleration based on the target traveling state, and set an input voltage of an inverter set in the second operation control to be lower than the input voltage of the inverter set in the first operation control when an operating state of a rotating device represented by an output torque and a rotational speed of the rotating device is not changed.