A fuel cell includes a plurality of fuel cell units. Each fuel cell unit
includes an electrode assembly having electrodes and an electrolyte, a
pair of separators, and gas sealing members. At least two of the fuel
cell units include at least two electrode assemblies and at least three
separators. In each of the separators, reaction gas communication ports
are provided. In one of the separators of one of the stacked fuel cell
units that is located at the end in a direction of stacking, through
paths are formed. In one of the separators of one of the stacked fuel
cell units that is located at the other end in the direction of stacking,
reaction gas communication paths are formed. Both the through paths and
the reaction gas communication paths are formed in all separators that
are located between two fuel cell units that are located at the ends.