Disclosed are: a peptide comprising an amino acid sequence composed of contiguous nine amino acid residues derived from a WT1 protein, wherein an amino acid residue at position 2 in the amino acid sequence is selected from the group consisting of Ala, Ile, Leu, Val, Phe, Tyr, Ser and Asp and an amino acid residue at position 9 in the amino acid sequence is Arg； a polynucleotide encoding the peptide； a pharmaceutical composition comprising the peptide； and others.
