This cross-sectional study examined the effect of immigration and acculturative stress on the mental health of a sample of 197 Lebanese immigrants in Montreal. An Orthogonal Model of Cultural Identification was used to determine whether the acculturation style adopted by immigrants had any effect on mental health or on acculturative stress. Results revealed no significant differences in psychological distress between the Lebanese sample and a comparative group of Quebec native-born. Among the indices of acculturative stress, adaptation problems alone predicted psychological distress. Finally, acculturation styles did not have any effect on psychological distress or on acculturative stress indices, with discrimination excepted. Individuals who adopted the Assimilation style reported less discrimination than those in the Ethnocentric and Integration groups. Results are discussed with reference to findings reported in the literature on Canadian studies.