The present invention addresses the problem of finding 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 containing as an active ingredient: (a) a polypeptide consisting of any one of the amino acid sequences represented by SEQ ID NOs: 3 to 45； or (b) a polypeptide comprising one to several amino acid deletions, substitutions or additions in the amino acid sequence of the polypeptide (a)； is useful as an agent for treating or preventing cancer, etc.
