The present invention relates to an apparatus (1) for measuring the anatomical conformation of the leg, comprising a support frame (10) and image acquiring and processing means (21) movably associated with said support frame (10), and a data processing control unit in data communication with said image acquiring and processing means (21). The apparatus according to the present invention allows to acquire correctly the proper measurement of the anatomical conformation of the leg, both on the front plane and on the sagittal plane, in an accurate, reliable and repeatable manner and by minimizing the manual intervention by the operator, while making the data directly available on a PC, tablet, smartphone or similar media.