To provide an apparatus and a method for continuously casting a silicon ingot reducible of contamination by metal impurities in a cast ingot and a wafer which is cut out from the ingot.

The apparatus for continuously casting a silicon ingot comprises a cooling crucible 7 for continuously casting by melting silicon raw material, having no bottom and having conductivity, for use when continuously casting a polycrystalline silicon by an electromagnetic casting method; an induction coil 8 surrounding the cooling crucible, and heating the silicon raw material fed in the cooling crucible by electromagnetic induction; and a chamber 1 for housing respective members, wherein a wool material 17 is disposed on the inner wall surface of the chamber 1 and/or at least a part of the surface of the members housed in the chamber 1.