The phonon spectra, band structure and density of states of cubic perovskite SnTiO ₃ were investigated using first-principles density functional theory (DFT) computation. The potential energy curves of cations displacement and the formation energy of Sn substitution to B-site were calculated to estimate the structure stability. The results indicate that perovskite SnTiO ₃ is a promising ferroelectric end member for lead-free piezoelectric materials and applications.