We have studied $YBa_2Cu_3O_{7-x}$ thin film prepared by MOCVD on $SrTiO_3$ single crystal substrate, using Raman scattering and resistivity measurement. We could observe four peaks beloning to Ag mode from Raman scattering and also observe the 303$cm^{-1}$ peak, which seems to belong to $B_{3g}$ mode. This is consistent with the X-ray diffraction data, which show that some grains in these films have c-axes parallel to the plane of substrate. And the 303$cm^{-1}$ peak implies that all the samples are othorhombic superconductors also. Air-quenched sample had more impurity phase ($BaCuO_2$) than other samples, and it has less oxygen content than others. Resistivity measurement for the samples show the superconducting phase transition about 91K, but rapidly annealed sample seems to have some impurities compared to other samples. However this result was not apparent in Raman scattering and X-ray diffraction data.
