Abstract: A bone-morphometric apparatus (20) is provided with a bone-morphometric data processing unit (32), including at least an image storage unit, such as an image memory (56), a microprocessor unit (60), and an input unit for entering reference points to specify an object measuring region. The data processing unit (32) stores either digital data of an X-ray image (22a) of a sample bone formed on an X-ray film (22) simultaneously with an image of a given standard block (11), obtained by illuminating the X-ray film with illuminating light from a light source (41) and automatically detecting the quantity of light transmitted through the image (22a) by an image detector (42), or digital data of a radiographic image of the sample bone obtained by a radiographic image-forming apparatus (90) in the image storage unit, so as to subject the stored digital data to arithmetic operation, to thereby obtain bone-morphometric data.