A radiography apparatus for mammography comprises a supporting column or stand having a main direction of development, a ground supporting base to which the column is secured and a radiography assembly the radiography assembly, secured in a sliding manner to said column and moving along the same between a first operational position and a second operational position, comprises an emitter of rays for radiography, a corresponding detector for acquisition of the image obtained by means of said rays and a system for positioning and maintaining in position a breast to be X-rayed, operationally active between said emitter and detector the column moves with respect to the base between a first raised operational position and a second lowered operational position.
