It is arranged so that a camera user can recognize presence of camera shake in a case where the user is looking at a subject through an optical viewfinder. A portion of the image of a subject captured by a solid-state electronic image sensing device is displayed in an electronic viewfinder constituted by a liquid crystal display unit. An image of a subject optically formed via an objective window of the optical viewfinder and the portion of the image of the subject displayed in the electronic viewfinder are superimposed. If camera shake is taking place, the portion of the image of the subject in the superimposed images will appear blurry. By viewing this portion of the image of the subject, therefore, the user can tell whether camera shake is taking place.