1. An image reading apparatus comprising: a first judging section which, each time a newly captured image is obtained by imaging, judges whether the newly captured image is a captured image obtained on a way of page-turning from a departure position of a page of a book to a destination position of the page; a temporary storage section which temporarily stores the newly captured image as a previous captured image when the first judging section judges that the newly captured image is not a captured image obtained on a way of page-turning from a departure position of the page of the book to a destination position of the page; a second judging section which, prior to temporarily storing the newly captured image as a previous captured image, judges whether, based on a latest captured image temporarily stored as a previous captured image so far by the temporary storage section and the newly captured image to be temporarily stored by the temporary storage section, the latest captured image and the newly captured image area captured image of same pages in an opened state; and a determining section which determines the latest captured image as a storage target when the second judging section judges that the latest captured image and the newly captured image are not a captured image of same pages in an opened state.