To provide a method for refining copper capable of satisfying characteristics required for a copper wire rod without performing electrolytic refining.

The method has: a melting step for melting copper containing one or more metallic elements selected from the group consisting of Sn, Pb, Ni and Zn; and a refining step where, after slag containing SiO2and FeO is brought into contact with the resultant molten metal containing the molten copper, the slag is removed and the metallic elements are removed from the molten metal. In particular, when the slag is brought into contact with the molten metal, oxygen concentration in the molten metal is made to be 5,000 to 12,000 ppm by weight.

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