A fuel cell stack, comprising: at least two cell modules, each of which comprises an integrally-stacked plurality of fuel-cell single cells; and a sealing plate interposed between the at least two cell modules, wherein: each of the plurality of fuel-cell single cells comprises a membrane electrode assembly and a pair of corrugated separators sandwiching the membrane electrode assembly, the sealing plate comprises a sealing member (52, 53) that seals an interface between the sealing plate and an edge part of the at least two cell modules, the fuel cell stack further comprises: a member contacting means to transfer a load in a stacking direction, disposed in a sealed inner area between the at least two cell modules and the sealing plate, the member contacting means comprises: a plurality of protrusions formed within the sealed inner area by corrugations of the corrugated separators located on an outer side of the outermost fuel-cell single cells of each cell module, and an opening of the sealing plate that allows the plurality of protrusions on both sides thereof to contact with each other through the opening, and the apexes of the corrugations are set to a level higher than a regular level in the separators. at least two cell modules, each of which comprises an integrally-stacked plurality of fuel-cell single cells; and a sealing plate interposed between the at least two cell modules, wherein: each of the plurality of fuel-cell single cells comprises a membrane electrode assembly and a pair of corrugated separators sandwiching the membrane electrode assembly, the sealing plate comprises a sealing member (52, 53) that seals an interface between the sealing plate and an edge part of the at least two cell modules, the fuel cell stack further comprises: a member contacting means to transfer a load in a stacking direction, disposed in a sealed inner area between the at least two cell modules and the sealing plate, the member contacting means comprises: a plurality of protrusions formed within the sealed inner area by corrugations of the corrugated separators located on an outer side of the outermost fuel-cell single cells of each cell module, and an opening of the sealing plate that allows the plurality of protrusions on both sides thereof to contact with each other through the opening, and the apexes of the corrugations are set to a level higher than a regular level in the separators. each of the plurality of fuel-cell single cells comprises a membrane electrode assembly and a pair of corrugated separators sandwiching the membrane electrode assembly, the sealing plate comprises a sealing member (52, 53) that seals an interface between the sealing plate and an edge part of the at least two cell modules, the fuel cell stack further comprises: a member contacting means to transfer a load in a stacking direction, disposed in a sealed inner area between the at least two cell modules and the sealing plate, the member contacting means comprises: a plurality of protrusions formed within the sealed inner area by corrugations of the corrugated separators located on an outer side of the outermost fuel-cell single cells of each cell module, and an opening of the sealing plate that allows the plurality of protrusions on both sides thereof to contact with each other through the opening, and a plurality of protrusions formed within the sealed inner area by corrugations of the corrugated separators located on an outer side of the outermost fuel-cell single cells of each cell module, and an opening of the sealing plate that allows the plurality of protrusions on both sides thereof to contact with each other through the opening, and the apexes of the corrugations are set to a level higher than a regular level in the separators.