To provide a refining method for scrap silicon using an electron beam, which is suitable for recycling the scrap silicon generated accompanied by the production of silicon products such as silicon wafers.

The refining method includes a process for selectively preparing N-type scrap silicon lumps containing only specified impurity elements, a process for crushing the prepared scrap silicon lumps, a process for placing the crushed silicon in a vacuum vessel, a process for melting the crushed silicon placed in the vacuum vessel by irradiating it with an electron beam, so as to evaporate the impurity elements, and a process for solidifying the obtained molten silicon.