The invention concerns an elastomer seal (3) arranged in a generally rectangular groove of a bipolar plate (1), comprising in at least two opposite corners one first loop (6) urged to be attached on a corner pin (7) of the plate (1) and at least a second loop (8) designed to be urged to be attached, when the two plates are assembled enclosing between them an exchanging membrane, to a corner pin of the other polar plate. The seal further comprises studs (10) received in recesses of the plate and forms projecting lugs (11) for crimping the terminals of electronic components. The invention is applicable to the production of fuel cells.