1. An autofocus control apparatus comprising: a solid-state electronic imaging device that images a subject and outputs image data representing a subject image formed by an imaging lens that is provided ahead of a light receiving surface of the solid-state electronic imaging device and is movable along its optical axis; a first control device that controls said solid-state electronic imaging device so as to image the subject in response to an imaging command and output the image data representing the subject image before formal imaging; an object area detection device that detects an object area including the whole or a part of an object in the subject image represented by the image data outputted from said solid-state electronic imaging device under the control of said first control device; and a position control device that controls the position of said imaging lens so as to move to a focusing position on the basis of data corresponding to the object area detected by said object area detection device.