Abstract: The invention relates to an electrical breast pump (12) comprising a breast cover (2) having a breast funnel (3) for at least partially receiving the breast, a pumping device (7) having a motor (8) and preferably one energy accumulator (10), and a milk storage unit (4) with having a milk container (5) for receiving the pumped milk, wherein, in a standing position of the electrical breast pump (1) on a surface (10), the breast cover (2) and the pumping device (7) lie substantially within a virtual general straight cylinder, wherein the base area thereof corresponds to the area—extended by a factor of 2.5, preferably by a factor of 2.0, particularly preferably by a factor of 1.8—of the greatest largest cross-section of the milk storage unit (4) parallel to the surface (10), wherein the area centroid of the base area is identical to the area centroid of the area of the greatest largest cross-section, and the height of the virtual general straight cylinder is continuous in both directions.