Provided is a novel immunity induction agent useful as a cancer treatment and/or prevention agent or the like. The immunity induction agent contains, as an active ingredient: at least one polypeptide having immunity induction activity and selected from polypeptides (a), (b), and (c), namely, (a) a polypeptide comprising at least seven successive amino acids in the amino acid sequence indicated by sequence numbers 4, 2, 22, or 24 in the sequence table, (b) a polypeptide comprising at least seven amino acids and having a sequence identity of at least 90% with respect to polypeptide (a), and (c) a polypeptide containing polypeptide (a) or (b) as a partial sequence； or a recombinant vector that can express the polypeptide in vivo and contains a polynucleotide that codes for the polypeptide.
