A fuel cell stack having a structure in which a plurality of single fuel cells C(1) and a plurality of interconnectors (5) are disposed alternately between a pair of end members and such that a junction member J composed of an elastic member (20) and an electrically conductive member (21) is disposed in a space (3a) formed between a first end member (3) and a first interconnector (5(1)). A portion of the electrically conductive member (21) is disposed between the first end member (3) and the elastic member (20), and another portion of the electrically conductive member (21) is disposed between the first interconnector (5(1)) and the elastic member (20); and the first end member (3) and the first interconnector (5(1)) are electrically connected through the electrically conductive member (21).