LaAlO3 translucent ceramics were fabricated with solid-state reaction method and sintered in vacuum condition. The powders are synthetized at 1200°C. There are almost no pores in the grains of ceramics sintered at 1750 °C. But the ceramics have few La2O3 second phase. The highest transmittance is 22%. The low transmittance may be caused by scattering losses of La2O3 second phase.