A fuel cell, comprising: a power generation layer including an electrolyte membrane, an anode formed on one side of the electrolyte membrane and a cathode formed on the other side of the electrolyte membrane; a pair of separators arranged across the power generation layer; and a gas flow path layer (132, 134) provided between the power generation layer and at least one of the separators, wherein the gas flow path layer (132, 134) is structured by a plurality of corrugated elements, wherein each corrugated element has a corrugated cross section where first convexes that are convex toward the separator and second convexes that are convex toward the power generation layer are alternately arranged in a first direction, and the plurality of corrugated elements are arranged in a second direction that is substantially perpendicular to a stacking direction of the fuel cell and the first direction, such that at least part of a top surface of the first convex in one corrugated element and at least part of a bottom surface of the second convex in an adjacent corrugated element cooperatively form an integral surface, and a plurality of through holes are formed between the respective adjacent corrugated elements, and wherein the plurality of corrugated elements constituting the gas flow path layer (132, 134) include a corrugated element having positions of the first convexes and the second convexes shifted in a positive side of the first direction from those of an adjacent corrugated element, and a corrugated element having positions of the first convexes and the second convexes shifted in a negative side of the first direction from those of an adjacent corrugated element, characterized in that a volume of a first reaction gas flow path, which is formed along the positions of the second convexes on a separator-side of the gas flow path layer (132, 134), is less than a volume of a second reaction gas flow path, which is formed along the positions of the first convexes on a power generation layer-side of the gas flow path layer (132, 134) and is connected with the first reaction gas flow path via the through hole. a power generation layer including an electrolyte membrane, an anode formed on one side of the electrolyte membrane and a cathode formed on the other side of the electrolyte membrane; a pair of separators arranged across the power generation layer; and a gas flow path layer (132, 134) provided between the power generation layer and at least one of the separators, wherein the gas flow path layer (132, 134) is structured by a plurality of corrugated elements, wherein each corrugated element has a corrugated cross section where first convexes that are convex toward the separator and second convexes that are convex toward the power generation layer are alternately arranged in a first direction, and the plurality of corrugated elements are arranged in a second direction that is substantially perpendicular to a stacking direction of the fuel cell and the first direction, such that at least part of a top surface of the first convex in one corrugated element and at least part of a bottom surface of the second convex in an adjacent corrugated element cooperatively form an integral surface, and a plurality of through holes are formed between the respective adjacent corrugated elements, and wherein the plurality of corrugated elements constituting the gas flow path layer (132, 134) include a corrugated element having positions of the first convexes and the second convexes shifted in a positive side of the first direction from those of an adjacent corrugated element, and a corrugated element having positions of the first convexes and the second convexes shifted in a negative side of the first direction from those of an adjacent corrugated element, characterized in that a volume of a first reaction gas flow path, which is formed along the positions of the second convexes on a separator-side of the gas flow path layer (132, 134), is less than a volume of a second reaction gas flow path, which is formed along the positions of the first convexes on a power generation layer-side of the gas flow path layer (132, 134) and is connected with the first reaction gas flow path via the through hole.