The invention relates to a device (2) for fixing a cup (3) in a bone (21), said device comprising a tubular body (17) extending along a longitudinal axis (A) between a proximal end (18) for co-operating with the cup (3) or a coupling body (9), and a distal end (19) to be fixed in the bone (21), the tubular body (17) defining an inner peripheral surface (24) and an outer peripheral surface (25) provided with screw means. The screw means extend from the proximal end (18) to an intermediate region (27) of the outer peripheral surface (25) arranged at a distance from the proximal (18) and distal (19) ends, and the inner peripheral surface (24) defines a female assembly portion (28) extending from the proximal end (18) in order to co-operate with a male assembly portion of the cup (3) or the coupling body (9).
