This second volume of Oeuvres philosophiques et scientifiques d'al-Kindī deals with the first metaphysical and cosmological writings in Islamic philosophy. It contains a new critical edition and French translation of six treatises due to al-Kindī, all devoted to these matters. It also contains fragments quoted by the Philosopher's successors. All those writings, rigorously edited and translated, brought together point out the true conception of philosophy of al-Kindī, philosopher and mathematician.