A new polybipyridine linked with oxadiazole and 2,5-didecyloxybenzene was prepared via simple condensation and ring closing reaction. The polymer P2 is basically an amorphous material with thermal decomposition temperature greater than 500 degrees C. Introduction of didecyloxy group into the rigid oxadiazole backbone resulted in better solubility in common organic solvents such as THF, chloroform, and DMF. UV-vis and fluorescence spectroscopy were employed to investigate the optical properties both solution in the presence of a variety of metal cations, in which the polymer would be a good candidate for optical sensory material for metal ion.