Hexagonal phase Sm(OH) 3 nanoroll sticks were first synthesized by hydrothermal method, and cubic phase Sm 2 O 3 nanoroll sticks were obtained by post-annealing treatment at 450°C. The growth of Sm 2 O 3 nanoroll sticks was found to be [40-4] direction. Their characteristics were examined by scanning electron microscopy, transmission electron microscopy, X-ray diffraction crystallography, Raman, FT-IR, UV-Vis-NIR absorption, and temperatureprogrammed reduction experiment.