An alkaline protease variant derived from an alkaline protease consisting of an amino acid sequence represented by SEQ ID NO: 2 or consisting of an amino acid sequence having an identity of 90% or more therewith, which variant has mutations wherein one or more amino acid residues at positions selected from (a) position 6, (b) position 15, (c) position 16, (d) position 65, (e) position 66, (f) position 82, (g) position 83, (h) position 204, (i) position 319, and (j) position 337 of the amino acid sequence represented by SEQ ID NO: 2, or at positions corresponding thereto are substituted with the following amino acid residues:
(a) or a position corresponding thereto: Typ, Leu, Val, Ile, Met, Tyr, Gln, Lys, Thr, Phe, Arg, Ser, Cys, Ala, or His;
(b) or a position corresponding thereto: Glu, Met, Asp, Val, Gln, Arg, Cys, Trp, Ala, or Phe;
(c) or a position corresponding thereto: Met, Glu, Arg, Val, Lys, Phe, Tyr, Ile, His, Asp, or Cys;
(d) or a position corresponding thereto: Trp;
(e) or a position corresponding thereto: His, Trp, Ser, or Leu;
(f) or a position corresponding thereto: Ala, Glu, Gln, Ser, Cys, Gly, His, Lys, Arg, Met, or Asn;
(g) or a position corresponding thereto: Ala, Ser, or Cys;
(h) or a position corresponding thereto: Glu, Asp, Cys, Val, Thr, Pro, His, Ile, Trp, Ser, Asn, Lys, or Arg;
(i) or a position corresponding thereto: Trp, Val, Thr, Leu, Ile, Cys, Glu, Lys, Tyr, Arg, Phe, Gln, Met, Pro, Asp, Asn, His, or Ser; and
(j) or a position corresponding thereto: Arg, Gly, Ser, Lys, Gln, Thr, His, Ala, Cys, or Val.