The title compound, [CuMo(4)O(13)(C(21)H(15)N(3))(2)](n), was synthesized by the reaction of ammonium molybdate, copper acetate and 4-[3,5-bis(pyridin-4-yl)phenyl]pyridine (DPPP) in an aqueous medium under hydrothermal conditions. The two unique molybdenum centers and the copper center adopt MoO(4) tetrahedral, MoO(5)N octahedral and CuO(4)N(2) octahedral geometries, respectively. These polyhedra are connected to each other through corner-sharing to form a two-dimensional Cu-Mo-O layer, which is further linked by the DPPP ligands to form the three-dimensional inorganic-organic hybrid framework.