The invention relates to a cup (100) for acetabulum (200) of a total hip prosthesis (1), of the type having a hollow hemispherical shape defining an interior volume (V), an equatorial plane (P), an outer hemispherical surface (120) to be impacted into a bone, an inner hemispherical surface (110), and a hemispherical polar surface (130). In addition, the outer hemispherical surface (120) is defined by a center of revolution (121) belonging to the equatorial plane (P). The inner hemispherical surface (110) is defined by a center of revolution (111) positioned outside the interior volume (V) at a distance from the equatorial plane (P) of at least 1 millimeter on an axis (A). ) normal to the equatorial plane (P) and passing through the center of revolution (121) of the outer hemispherical surface (120). The hemispherical polar surface (130) is defined by a center of revolution (131) positioned outside the interior volume (V) at a distance from the equatorial plane (P) at least equal to the radius (112) of the hemispherical surface. interior (110), on a normal axis (A) to the equatorial plane (P) and passing through the center of revolution (121) of the outer hemispherical surface (120) and the inner hemispherical surface (110). The radius (131) of the polar hemispherical surface (130) being greater than the radius (122) of the outer hemispherical surface (120), said radius (122) of the outer hemispherical surface (120) being greater than the radius (112) of the inner hemispherical surface (110) so that the thickness of the cup (100) is scalable. L'invention concerne une cupule (100) pour insert cotyloïdien (200) de prothèse totale de hanche (1), du type présentant une forme hémisphérique creuse définissant un volume intérieur (V), un plan équatorial (P), une surface hémisphérique extérieure(120) destinée à être impactée dans un os, une surface hémisphérique intérieure (110), et une surface hémisphérique polaire (130). De plus, la surface hémisphérique
