The Cu atom in [Cu(C(7)H(4)NOS)(C(7)H(5)NOS)(C(18)H(15)P)(2)] is tetrahedrally coordinated by a P(2)S(2) donor set. One S atom is derived from neutral benzoxazole-2-thione and the other from the deprotonated form of the ligand. The two sulfur ligands are connected via an N-H.N interaction, leading to the formation of an eight-membered ring.