The mercury isotopic compositions of 11 cinnabar samples collected from tombs at Shuangyuan Village, Qingbaijiang District, Chengdu, were determined. The results show a similar isotopic fractionation, ranging from -1.18‰ to -0.84‰ (avg.-1.010‰, S.E. 0.105‰, n=11). Compared with published data of some cinnabar ores, these fractionation numbers are different. In the future, these numbers may help to identify possible mineral sources of the Shuangyuan Village samples if mercury isotopic compositions of nearby cinnabar mines are analyzed.