Chemical analysis of a small amount of rust was taken from the blade part of a halberd excavated in an old tomb has revealed that magnetile ores were used as the starting raw material. The carbon content of the steel of the blade was estimated to be about 0.5 to 0.6% by the examination of microstructure of rust. The composition of non-metallic inclusions in the steel suggests that fluxes mixed with CaO-containing materials were utilized in the steelmaking process. Method for manufucturing the halberd is also discussed.