Abstract. The results of a survey conducted after the second round of the 1988 presidential election stress the inadequacy of the classical models of voting behaviour, as far as the Le Pen vote is concerned. The majority of lepenist electors identify themselves neither with the National Front, nor with the extreme-Right; they show no electoral stability, no strong sociological specificity. Less educated than the average, they do not correspond to the profile of the rational voter. With the exception of a small hardcore of regular voters, politicized, extremist and dedicated to the National Front, Le Pen supporters are protest voters that come and go.