Abstract: An arrangement for ventilating a laboratory is provided wherein a plurality of center carrier elements are in a spaced arrangement above a laboratory table row that defines two walking areas, one on each side of the table row. Each center carrier element comprises a vertical column element fastened on an upper end to the laboratory ceiling and at its lower end having center extension arms extending above the of laboratory table row. On the bottom side, the carrier elements carry a first and second air supply conduit in spaced relationship and delimit a lower receiving space therebetween extending over the length of the laboratory table row to carry supply lines. On the top side, the carrier elements carry an exhaust air conduit or alternatively, a side exhaust air conduit is received on side carrier elements opposite the first or the second air supply conduit.