In an imaging apparatus, when a pan/tilt head is located at a predetermined position, a photographed image acquired by an imaging unit is stored as a registered image. A photographed image, which is newly acquired by the imaging unit, is compared with the registered image when the pan/tilt head is not driven from the predetermined position after the registered image is stored. The pan/tilt head is driven to an initial position if, as a result of comparison between the photographed image and the registered image, it is determined that a degree of matching between the photographed image and the registered image satisfies a predetermined condition.