 “Al-Fârâbî’s metaphysics”, as understood here, means not just his views, and arguments for those views, on a series of metaphysical topics, but his project of reconstructing and reviving metaphysics as a science. This is part of his larger project of reconstructing and reviving “the sciences of the ancients”: his scientific project in metaphysics is inseparable from his interpretation and assimilation of Aristotle’s Metaphysics. We start with some motivation for Fârâbî’s larger project of reconstructing “the sciences of the ancients”, then turn to what he says about metaphysics as one such science and about Aristotle’s Metaphysics, and then to details of his reconstruction of metaphysics as a science, both in his account of maximally universal concepts such as being and unity, and in his account of God as the first cause of existence.