Gas flow passage formation plate for fuel cell and fuel cell stack

A gas flow passage formation plate for a fuel cell, wherein the gas flow passage formation plate is located between a membrane electrode assembly and a partition plate and is included in a separator of a cell in a fuel cell, the gas flow passage formation plate comprising:

• a plurality of projections that project toward the membrane electrode assembly, wherein the projections are arranged in a first direction and a second direction that is orthogonal to the first direction;
• a gas flow passage formed by a portion of the gas flow passage formation plate at a side opposing the membrane electrode assembly and including regions between all adjacent ones of the projections;
• a water flow passage formed by a portion of the gas flow passage formation plate at a side opposing the partition plate and including an inside of each of the projections;
• and
• a plurality of openings, each formed in a side wall of a corresponding one of the projections and connecting the inside and an outside of the corresponding projection, wherein each of the openings is arranged at only one location in the corresponding one of the projections,
• wherein each of the projections includes a first side having the opening and a second side opposite to the first side, the second side devoid of openings,
• wherein a first cross-sectional area of the gas flow passage that is orthogonal to a gas flow direction of the gas flow passage and located directly to the first side of each of the projections is less than a second cross-sectional area of the gas flow passage that is orthogonal to the gas flow direction and located directly to the second side of each of the projections.