1. An imaging device, comprising: a photographing lens for forming a subject image; an imaging section for converting the subject image to image signals and outputting the image signals; a storage section for storing image data obtained based on the image signals output from the storage section; an attitude detection section fox detecting an attitude of the imaging device; an image detection section for detecting a face image contained in the image signals; and a storage control section for determining storage start and storage end for the image data, based on detection results of the attitude detection section and detection results of the image detection section.