1. An image connection method at least comprising: the image input step of continuously inputting living body section images of a human body part by relative movement with respect to a read unit; the character extraction step of extracting character shapes from the living body section images; the common area searching step of searching common areas in which the character shapes match from two living body section images which are chronologically continuous to detect relative amounts of movement of the images; and the image connection step of connecting two adjacent living body section images to each other on the basis of the amounts of movement of the images to generate a living body image larger than a sensing surface of a sensor.