Patent ID: 7927759

Claim:
A fuel cell stack that is provided with a plurality of stacked separators, comprising: terminals that extend from at least one of any separators; packing formed from an elastic material for preventing moisture from outside from encroaching into a stack housing, in which are formed a plurality of through holes through which the terminals are inserted, and that has an independent circumferential wall portion for each through hole; a packing casing that has a packing housing concave portion that envelops the packing and supports a bottom surface of the packing, and has through holes through which the terminals are inserted; and a connector member comprising a plurality of pressing surfaces, which correspond to the plurality of through holes formed in the packing, and which press a top surface and side surfaces of the respective circumferential wall portions of the packing, wherein bulge portions are provided on at least one of the side surfaces of the circumferential wall portions and the pressing surfaces that press the side surfaces, wherein each bulge portion protrudes to press against the other of the side surfaces of the circumferential wall portions and the pressing surface, and internal surfaces of the through holes in the packing are in contact without a gap with external surfaces of the terminals.