A steering control apparatus for an automotive vehicle is provided with s steering control system 41 that comprises a detected steering angle calculating section for calculating a detected steering angle .theta.j based on a variation of a motor rotational angle detected by a motor rotational angle sensor 25. An electric motor 19 is connected to a steering wheel 33 through a reduction mechanism. As the motor rotational angle sensor 25 is provided on the the electric motor 19, resolution of the detected steering angle .theta.j calculated based on the variation of the motor rotational angle becomes higher than that in the prior art, and thereby it becomes possible that the steered wheels are steered under the stable positioning control. Further, as the motor rotational angle sensor 25 is originally provided on the electric motor 19, the size and cost of the apparatus is restrained from being large and high.