This paper analyzes the change and stability of Chilean electorate during the period 1990-2000. Chile is experiencing major changes in its electoral behavior. Such changes coexist with important continuity elements. Beneath an image of stability, radical electorate realignment is sprouting up. Between 1990
and 2000, we can observe a high level of aggregate electoral stability; however, during the same period an increase in politics disaffection has developed, together with disidentification with the parties and distrust of democratic institutions. The paper’ specific objective is to study the extent to which significant
changes have taken place in the distribution of the electorate among the parties, to analyze the foundations of the Chilean political parties’ electoral support and, finally, the effects of these movements and tendencies on the party system.