1. An imaging apparatus, comprising: an imager for fetching an optical image of an object so as to produce an image signal; a still-image recorder for recording on a recording medium an imaging signal corresponding to a still-image-use image size according to a still-image recording instruction; a moving-image recorder for recording on said recording medium an imaging signal corresponding to a moving-image-use image size according to a moving-image recording instruction; a still-image-use through image displayer so configured that the imaging signal is repeatedly created by said imager and a still-image-use through image corresponding to the still-image-use image size is displayed on a displayer; a moving-image-use through image displayer so configured that the imaging signal is repeatedly created by said imager and a moving-image-use through image corresponding to the moving-image-use image size is displayed on the displayer; a through image switcher for switching the still-image-use through image and the moving-image-use through image; and an acceptor for accepting the still-image recording instruction or the moving-image recording instruction when the still-image-use through image or the moving-image-use through image is displayed.