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We report the transport properties of a topological insulator candidate,LiMgBi.The electric resistivity of the title compound exhibits a metal-to-semiconductor-like transition at around 160 K and tends to saturation below 50 K.At low temperatures,the magnetoresistance is up to ～260％ at 9 T and a clear weak antilocalization effect is observed in the low magnetic-field region.The Hall measurement reveals that LiMgBi is a multiband system,where hole-type carriers(nh ～ 1018 cm 3) play a major role in the transport process.Remarkably,LiMgBi possess a large Seebeck coefficient(～440 μV/K) and a moderate thermal conductivity at room temperature,which indicate that LiMgBi is a promising candidate in thermoelectric applications.