Cephalostat (40) for acquiring teleradiographic images through an extraoral radiographic apparatus (71), having a pair of earpieces (44) at the ends of two shafts (43) and a small bar (47) for resting again nasion (2), said components being manually adjustable to adjust them to the skull of the specific patient under examination characterized in that said cephalostat (40) is free from metallic parts in the parts on which X-rays impinge, with the exception of radio-opaque markers (45, 48), and is interchangeable with a craniostat (72) fixed in the same seat of apparatus (71).
