PROBLEM TO BE SOLVED : To provide low-carbon sulfur free-cutting steel which has superior machinability (finished surface roughness, in particular) despite its Pb-free state and can be manufactured with high productivity by a continuous casting process. ?SOLUTION : At the time of tapping the low-carbon sulfur free cutting steel from a converter to a ladle and subjecting the steel to molten steel treatment in manufacturing the low-carbon sulfur free cutting steel, ≥70% of the FeMn alloy and FeS alloy to be added to the steel for the purpose of component adjustment are added to the steel during converter tapping and the ladle of ≤0.20% in the Si content and ≤0.30% in the Al content in the molten steel previously received therein or the ladle not subjected to the molten steel treatment at all after the execution of ladling is used, and the Si content in the molten steel after the molten steel treatment is controlled to ≤0.020% and the Al content to ≤0.0015%. ?COPYRIGHT : (C)2008, JPO&INPIT ?