Abstract: An apparatus for foaming liquid cosmetic substances, comprising a vessel for receiving a supply of a cosmetic substance for application and an electrically driven pump merging into the vessel and having an exit side connected to the air supply duct. A foam generator in the form of a porous, open-cell member is immersed in the substance and disposed at an end of the air supply duct and is adapted to introduce the air stream supplied thereto by the pump into the substance in the form of a plurality of small bubbles. A delivery nozzle is connected to the vessel from which the foam developed in the vessel emerges.