In this research, studies the physical properties of the strontium barium phosphate glasses with varied the concentration of Pr₂O₃. Glass samples were prepared by melt – quenching technique at 1200 °C. The results found that all glass samples are clear, homogenous and transparent. The density and refractive index of glass samples were increased with increasing Pr₂O₃ concentration, while the molar volume trend to decreased when the Pr₂O₃ concentration doped in glasses is increased. In addition, when doped the praseodymium oxide in glass will not affect the Vickers hardness of barium phosphate glasses.