Fuel battery

A fuel battery comprising the porous metal body, the porous metal body serving as a gas diffusion layer, the porous metal body including a skeleton having a three-dimensional mesh-like structure, the porous metal body having a plate-like overall shape,

• the skeleton having a hollow structure, the skeleton comprising a primary metal layer and at least one of a first microporous layer and a second microporous layer,
• the primary metal layer being composed of nickel or a nickel alloy,
• the first microporous layer containing nickel and chromium, the first microporous layer being disposed on an outer peripheral surface of the primary metal layer,
• the second microporous layer containing nickel and chromium, the second microporous layer being disposed on an inner peripheral surface of the primary metal layer, the inner peripheral surface facing a hollow space of the skeleton.