| 摘要 |
A polymer electrolyte fuel cell according to the present invention includes: an electrolyte layer-electrode assembly (5); a first separator (6A) provided with a first reaction gas flowing region; and a second separator (6B) provided with a second reaction gas flowing region. In the first separator (6A), among one or more first turn portions (28), at least one first turn portion (28) is provided with a first recess (48) and first projections (58). In the second separator (6B), among one or more second turn portions (29), at least one second turn portion (29) is provided with a second recess (49) and second projections (59). When seen in the thickness direction of the first separator (6A), an overlap area is less than or equal to 5% of a gross area, the overlap area being a total overlap area between the first and second recesses (48, 49), the gross area being the total of the following areas: the area of all the first recesses (48); and the area of all the second recesses (49).
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