This method for manufacturing stainless steel comprises: a step for dissolving stainless steel raw material in an electric furnace (1) to produce molten iron (2); a step for decarbonizing the molten iron (2) in a revolving furnace (4) to produce stainless raw molten steel (2a); a step for adding calcium carbonate (11) and solidifying the slag (10) without the addition of a reducing agent to slag (10) generated in the stainless raw molten steel (2a) in the decarbonizing treatment; a step for separating the solidified slag (10); and a step for returning the separated slag (10) to the electric furnace (1).
