Political participation in Belgium is analysed according to two types of political participation: conventional participation and protestation, measured by a Guttman scale. The study describes the two types of political participation in the different regions in Belgium: Flanders, Wallonia and Brussels. A comparaison with some western countries is made. Political participation in Belgium is weak. It depends on the regional division and the sociological characteristics. Moreover, political participation is linked to the Belgian traditionnal clivages.