The present invention relates to a WT1 peptide which has an amino acid sequence consisting of contiguous amino acids derived from a WT1 protein and induces WT1-specific helper T cells by binding to an MHC class II molecule, a pharmaceutical composition comprising them and the like.本發明係關於一種肽、以及含有其之醫藥組合物等,該肽係具有包含源自WT1蛋白質之連續胺基酸之胺基酸序列的WT1肽,其與MHC第二型分子結合而誘導WT1特異性輔助T細胞。