A polymer electrolyte fuel cell according to the present invention includes: a unit cell (50) including a membrane-electrode assembly (5) and a pair of separators (4A and 4C); a manifold (91); a gas introducing member (61); and a first member (59). A recess (46) is formed at a gas lead-out port (44) side of the gas introducing member (61) so as to be connected to the gas lead-out port (44). The first member (59) is provided such that a communication portion (60) thereof communicates with the manifold (91). The gas introducing member (61) is provided such that: the recess (46) communicates with the communication portion (60); and when viewed from a thickness direction of the polymer electrolyte membrane (1), the gas lead-out port (44) and a main surface of the first member (59) overlap each other.
