1. An imaging device comprising: a template selector that selects a template; a synthesis area selector that selects a synthesis area for a panoramic image in the selected template; a imaging unit that acquires moving images; a movement detector that detects a movement of said imaging device and outputs the detected movement as movement information; a panoramic image producer that produces a panoramic image being a still image corresponding to said synthesis area for the panoramic image based on the moving images and the detected movement of said imaging device; a synthesized image producer that sequentially synthesizes the panoramic image that is being produced into the synthesis area for the panoramic image during acquisition of the moving images to produce and renew a synthesized image; a display unit that sequentially displays the synthesized image that is produced and synthesized on a display screen; and a storage unit that stores the template and one or more of the moving images, the panoramic image, and the synthesized image.