A fuel cell for generating an electric energy with a chemical reaction
between hydrogen and oxygen, has a membrane electrode assembly for
generating an electric field through the membrane electrode assembly with
the chemical reaction between the oxygen and the hydrogen, a pair of
first and second contact members, the first contact member contacting a
first side surface of the membrane electrode assembly, and the second
contact member contacting a second side surface of the membrane electrode
assembly so that the electric field is formed between the first and
second contact members, and a pressing member for generating a pressing
force for urging each of the first and second contact members toward
corresponding one of the first and second side surfaces in a pressing
direction.