1. An image capturing apparatus that captures an image of a target subject by image capturing means via focus control of an optical system, displays a captured image on a display means, and records the captured image on a recording medium by recording means, the image capturing apparatus comprising: image acquisition means for acquiring a plurality of images; blurriness determination means for determining each region of the acquired plurality of images which is blurry, said blurriness determination means evaluating each image in its entirety for blurry regions, said blurriness determination means determining regions which are blurry due to shaking of the image capturing apparatus and due to a subject of the region being out-of-focus; and error display means for identifying an error region on the display means only for each region of the image determined to be blurry by the blurriness determination means, said error display means identifying the regions which are blurry due to shaking of the image capturing apparatus and due to a subject of the region being out-of-focus.