The title complex, [LiMo(C6H16N2)(C24H29N2P2)(CO)4], contains a distorted octa­hedrally coordinated molybdenum centre bearing a li­thia­ted P,P′-cis-chelating PNPN ligand, which results in a nearly planar four-membered metallacycle. The Li atom is coordinated by one equivalent tetra­methyl­ethylenedi­amine. In the crystal, mol­ecules are linked via weak C—H...O inter­actions, forming a chain along the b-axis direction.