The LTE abundances of sulfur (S) were explored in the sample of 15 metal-poor stars with the metallicity range of −4<[Fe/H]<−1.5, based on the equivalent widths of the S I(1) 9212 and 9237 Å lines measured on high-resolution spectra, which were observed by the Keck I HIRES. Combining our results and those of Takada-Hidai et al. (2005), we found that the behavior of [S/Fe] against [Fe/H] shows a nearly flat trend in the range of metallicity down to [Fe/H]∼−4.