Abstract: Our studies on the liquid membranes exhibiting active and selective transport are reviewed.Firstly, the bulk liquid membrane where active transport of anion occurrs with coupling to a transmembrane redox reaction is described. The characteristics and mechanism of the transport are discussed.Secondly, the liquid membrane for active transport of monosaccharides is described. It is shown that monosaccharides, one of electroneutral compounds, can be transported against their concentration gradients by use of phenylboronic acid as a carrier. The application of this membrane system to nucleoside transport is also presented.Thirdly, the enantioselective transport of amino acids through the supported liquid membrane containing chiral crown ether is described. The transport behavior of amino acids is discussed.