Abstract: In this research, study the effect of gamma radiation on the some of optical properties of (Fe2O3) thin 2 3 film prepared by chemical spray pyrolysis method in this study, structural properties including (X-ray diffraction, FTIR) tests were studied, the results were (X-ray) tests showed the membranes are multi crystallization and showed tests (FTIR) demonstrate the active groups of the prepared membrane. As for optical measurements, there was a change in optical properties after exposure of the membrane to irradiation as it has decreased energy gap as well absorbance spectrum, reflectance, refractive index, extinction coefficient, absorption coefficient, real and imaginary dielectric constant while the transmittance spectrum it has increased after exposure of the membrane to irradiation.