FUEL CELL

The present invention is a fuel cell that includes: a membrane electrode assembly 50 including an electrolyte membrane 51 and catalyst layers 52, 53 joined on both sides of the electrolyte membrane; and a pair of separators 70, 70 disposed at both sides of the membrane electrode assembly 50 to respectively form gas flow spaces µ where two types of power generation gases flow, wherein an electrically conductive porous substrate 80 folded in a corrugated shape is disposed in at least one of the gas flow spaces µ, µ defined on both sides of the membrane electrode assembly 50, and a gas flow space in which the electrically conductive porous substrate is disposed is divided into a plurality of gas flow paths µ1 substantially parallel to a flow direction of the power generation gases.