1. An imaging apparatus, comprising: an image sensor which outputs an image corresponding to a photographic subject image formed on an imaging plane; a shooting lens which has a focus lens for adjusting a degree of focus on the imaging plane, and forms the photographic subject image on the imaging plane; a display which displays the image; and a confirmation image creator which creates a focus state confirmation image in which a part, or a whole of the image is enlarged, wherein based on the degree of focus on the imaging plane changing from a state lower than a predetermined degree of focus to a state higher than the predetermined degree of focus and then changing to the state lower than the predetermined degree of focus in accordance with movement of the focus lens, the focus state confirmation image corresponding to the state higher than the predetermined degree of focus is automatically displayed on the display in response to the changing degree of focus, the focus state confirmation image is displayed in response to the change of the focus state during a focusing operation, wherein the focusing operation includes movement of the focus lens.