Breast cup unit for use with a breast pump for pumping human breast milk by means of negative pressure, in which the breast cup unit has a stable breast cup (2) and a flexible insert (3) breast cup for insertion into the breast cup (2), in which the breast cup (2) has a first open breast cup end for support in a mother breast (B), wherein the breast cup insert (3) has a first and second insert ends (34, 32), a breast support (30) adjacent to the first insert end (34) as well as a fitting (32 ), in which the breast support (30) has a support surface for the support on the mother's breast (B) and a housing hole (33), in which the fitting (32) is integrally formed of a single piece in the breast support (30), in which the first and second ends of the insert (34, 32) define a longitudinal direction (a), in which the first end of the open breast cup has a surrounding edge (22), in which the insert (3) of the breast cup can be fixed or fixed with the first end of the insert (34), in which the insert (3) of the breast cup extends at the end mounted from this first end of the insert 34 inside the breast cup (2) towards the second end of the insert (32) and in which the insert (3) of the breast cup extends between the first and second ends of the insert (34, 32) essentially at a distance from the breast cup (2), in which the second end of the insert (32) is movable in the assembled state of the insert (3) of the breast cup in the longitudinal direction (a) relative to the breast cup (2), characterized in that the breast support (30) extends in front of the support on the mother's breast (B) approximately perpendicular to the longitudinal direction (a) and is configured in front of the support on the mother's breast dre (B) approximately smooth.Unidad de copa de mama para la utilización con una bomba de mama para el bombeo de leche materna humana por medio de presión negativa, en la que la unidad de copa de mama presenta una copa de mama (2) de forma estable y un inserto flex
