This article analyses the marriage behaviour of immigrants using data from the INSEE Permanent Demographic Sample that span an extended period (1968-2000). The explanatory factors of exogamy are examined in an analysis that includes individual and contextual variables. The comparison between the labour market situation of immigrant groups and their greater or lesser propensity to exogamy is used to test certain theoretical perspectives that attribute a central role to intermarriage in the assimilation process. By emphasizing the analytical complexity of exogamy and the broad diversity of modes of immigrant integration, the findings suggest that these hypotheses may need to be qualified.