GAS DIFFUSION ELECTRODE AND PRODUCTION METHOD FOR SAME; MEMBRANE ELECTRODE ASSEMBLY AND PRODUCTION METHOD FOR SAME

[Object] To provide a gas diffusion electrode capable of a high current density operation of a fuel cell. [Solving means] A gas diffusion electrode including a hydrophilic porous layer having an electrically conductive material and an ion conductive material; and a catalyst layer adjacent to the hydrophilic porous layer, wherein a water transport resistance of the hydrophilic porous layer is smaller than a water transport resistance of the catalyst layer.