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In today’s demographic context, the population of South India is experiencing a longer life span, as well as a significant increase in international mobility in its many forms. Under these conditions, intergenerational relationships are changing. While migrations cause changes in the transmission from one generation to the next, they also alter the way in which family members relate to each other, as well as intergenerational solidarity. A socio-geographic study undertaken in the city of Chennai about parents whose children have migrated to Western countries (in the Brahmin high caste), has allowed us to study the organisation of long distance solidarity in a new family geography. These transnational families question the organisational models of care and solidarities applied to ageing persons living outside the joint family “ideal type”.