An object of the present invention is to discover a novel peptide useful as an active ingredient in an agent for treating or preventing cancer, and to provide the use of the polypeptide as an immune inducer. The immune inducer contains as an active ingredient, the following (i) or (ii): (i) at least one polypeptide having an immune-inducing activity and selected from the group of polypeptides (a) or (b), where: (a) polypeptides consisting of 7 or more consecutive amino acids within the region of positions 24 to 97 in the amino acid sequence represented by SEQ ID NO: 2; and (b) polypeptides comprising one to several amino acid deletions, substitutions and/or additions in the amino acid sequence of any one of the polypeptides (a); and (ii) a recombinant vector comprising at least one polynucleotide encoding any one of the polypeptides, and capable of expressing the polypeptide in vivo.