A direct liquid feed fuel cell stack has a structure in which membrane electrode arrays (MEAs), each having an anode electrode and a cathode electrode on either side of an electrode membrane, are stacked and a conductive anode plate and a conductive cathode plate are respectively formed to face the anode electrode and the cathode electrode, wherein the cathode plate comprises a plurality of straight flow channels in parallel, and a hydrophilic member, whose upper surface has the same plane as a bottom surface of the straight flow channel, is disposed perpendicular to the flow channels on one end of the cathode plate.