A breastshield unit for expressing human breastmilk has a receiving part (10) for receiving a human nipple, an underpressure chamber (40) for applying an under-pressure to the nipple, wherein the receiving part (10) opens into this underpressure chamber (40), and a membrane (3) for generating an underpressure in the underpressure chamber (40). The membrane (3) is designed in one or more pieces and at least partially surrounds the receiving part (10). This breastshield unit permits a separation of media in the area near the breast. It is small and easy to clean and is suitable in particular for use as a hands-free breastshield unit. (Figure 3)
