1. An imaging device comprising: an image pickup device that performs main photographing of a still image in response to input of a photographing request, while performing moving image photographing for displaying a live view image; a recording device that records a currently photographed image that is taken at the main photographing by the image pickup device in a recording medium; an image extracting device that extracts a predetermined number of images that have been photographed in the past from the recording medium; an animation creating device that creates an animation for showing that a reduced image of the currently photographed image is added to a reduced image of a last photographed image by using the currently photographed image that is taken at the main photographing and reduced images of the predetermined number of the extracted images; a display device that displays the still image or the moving image; and a display control device that displays the animation created by the animation creating device each time the main photographing is performed, while displaying the live view image that has been photographed by the image pickup device as a moving image on the display device.