The invention provides an information processing apparatus having an image pickup apparatus incorporated therein, said image pickup apparatus comprising image pickup means for picking up an image of an object, holding means for holding thereon a lens for forming an image on said image pickup means, said holding means having a serrated circumferential portion thereon, moving means for fitting with said serrated circumferential portion of said holding means to move, when said moving means is turned, said holding means along a direction of an optical axis of said lens and accommodation means for accommodating said holding means and said moving means therein. With the information processing apparatus, the holding means is moved in a direction of the optical axis of the lens by turning the moving means. Consequently, the focus of the lens can be adjusted to the object.