In this work, Sm(III) ions doped in borax glass on the (80-x)Na2B4O7.10H2O-20CaO3-(x)Sm2O3 system, where x is 0 wt% to 4 wt% has been successfully made by melt quenching techniques. The optical properties of the glass have been investigated by using luminescence spectroscopy. During luminescence study, the influence of composition on the emission intensities will be obtained the high intensity can occurs when the glasses prepared with 2 wt% of Sm(III) in excitation wavelength 250nm. The emission spectrum can be attributed to the transition level from 4G5/2 → 6H5/2, 6H11/2 level and emission spectrum have been considered as a function of Sm(III) concentration and have been measured on this paper.