Using data from a French national survey, preventive and dietary habits, alcohol and smoking consumption of three groups of migrants (Italy, Spain and Portugal, Maghreb) were compared to those of French nationals. Odds ratios were estimated using a logistic regression, after adjustment by age, socio-professional group and place of residence. Differences in attitude were observed, in particular: lower primary and secondary practice of prevention; lower consumption of meat and dairy products and higher consumption of starchy food and dried vegetables; lower consumption of alcohol and higher tobacco intake among Maghrebian migrants. The observed differences were interpreted in the light of other available data in France. They confirm notably imported dietary habits and a weaker perception of preventive messages, as shown in other studies.