This disclosure relates to a device for separating regenerative and/or adult stem cells from a fatty tissue taken from a biological structure. In one embodiment, the device includes a container for holding a substance mixture, the substance mixture including the fatty tissue and the regenerative and/or adult stem cells, and the container including at least two chambers separated from each other by at least one membrane. The device additionally includes a substance mixture feeding facility configured to introduce the substance mixture into the container, a rinsing agent feeding facility configured to introduce a fluid into the container, a stem cell removal facility configured to remove separated stem cells from the container, a rinsing agent removal facility configured to remove a substance mixture from the container that has been at least partially depleted of regenerative and/or adult stem cells, and a specifically permeable membrane.
