A control device includes an electronic control unit configured to expand a first detection range at least in front of a host vehicle during execution of current first steering control, determine whether next first steering control is needed to be implemented and whether a relative direction of a next second object with respect to the host vehicle is the same as a relative direction of a first object with respect to the host vehicle when the second object is detected, and perform relaxation steering control based on a target value smaller in absolute value than a return target value after an end of the current first steering control when the implementation of the next first steering control is determined to be needed and the relative directions with respect to the host vehicle are determined to be the same between the second and the first object.