The present invention provides an image processing program, a portable terminal, and an image processing method. The image processing program allows the ceteral process unit to execute the steps of: the imaging unit imaging the imaging object so that at least the positioning symbols in the at least two predetermined locations are included; the image acquisition unit detecting the positioning symbols from the imaged original image data, and recognizing a predetermined area calculated based on the positioning symbols as a first range; extracting only image data existing in the first range to acquire this image data as extracted image data; and storing the extracted image data in the image data storage unit.