Provided is a damage diagram creation support method, which includes: acquiring information on a region having internal damage to a structure within an inspection target region; acquiring a visible light image obtained by imaging the inspection target region with a visible light camera; detecting fissuring appearing on a surface of the structure in the visible light image; and creating a damage diagram in which the fissuring detected in the visible light image is traced. Also provided is a damage diagram creation support device capable of appropriately recording a detection result of fissuring automatically detected from an image.