A control apparatus for a vehicle provided with a steer-by-wire system, the vehicle including a steering actuator configured to turn a wheel of the vehicle, a reaction actuator configured to apply a torque to a steering wheel of the vehicle, and a steering sensor configured to detect a rotation of the steering wheel, the control apparatus comprising an electronic control unit configured to: execute normal steering control for, according to the rotation of the steering wheel, turning the wheel by controlling the steering actuator and applying a reaction torque to the steering wheel by controlling the reaction actuator; when an activation condition including that the normal steering control is not needed is satisfied, execute rotation suppression control for suppressing the rotation of the steering wheel without prohibiting the rotation of the steering wheel; and characterised in that the electronic control unit is further configured to: in the rotation suppression control, acquire a steering speed or steering torque of the steering wheel as a steering parameter based on a result detected by the steering sensor, determine a rotation suppression torque (Ts) for suppressing the rotation of the steering wheel based on the steering parameter, and control the reaction actuator such that the rotation suppression torque (Ts) is applied to the steering wheel. a steering actuator configured to turn a wheel of the vehicle, a reaction actuator configured to apply a torque to a steering wheel of the vehicle, and a steering sensor configured to detect a rotation of the steering wheel, the control apparatus comprising an electronic control unit configured to: execute normal steering control for, according to the rotation of the steering wheel, turning the wheel by controlling the steering actuator and applying a reaction torque to the steering wheel by controlling the reaction actuator; when an activation condition including that the normal steering control is not needed is satisfied, execute rotation suppression control for suppressing the rotation of the steering wheel without prohibiting the rotation of the steering wheel; and characterised in that the electronic control unit is further configured to: in the rotation suppression control, acquire a steering speed or steering torque of the steering wheel as a steering parameter based on a result detected by the steering sensor, determine a rotation suppression torque (Ts) for suppressing the rotation of the steering wheel based on the steering parameter, and control the reaction actuator such that the rotation suppression torque (Ts) is applied to the steering wheel. execute normal steering control for, according to the rotation of the steering wheel, turning the wheel by controlling the steering actuator and applying a reaction torque to the steering wheel by controlling the reaction actuator; when an activation condition including that the normal steering control is not needed is satisfied, execute rotation suppression control for suppressing the rotation of the steering wheel without prohibiting the rotation of the steering wheel; and characterised in that the electronic control unit is further configured to: in the rotation suppression control, acquire a steering speed or steering torque of the steering wheel as a steering parameter based on a result detected by the steering sensor, determine a rotation suppression torque (Ts) for suppressing the rotation of the steering wheel based on the steering parameter, and control the reaction actuator such that the rotation suppression torque (Ts) is applied to the steering wheel.