An object of the present invention to provide: a human pancreatic cancer antigen and/or a human colon cancer antigen that can be applied to the diagnosis and/or treatment of various types of cancers or tumors including pancreatic cancer and colon cancer as representative examples； a gene encoding the same； an anti-cancer vaccine using the same； or the like. The present invention provides a cancer antigen comprising a protein having the amino acid sequence shown in SEQ ID NO: 1； a peptide comprising a portion of said protein and having immune-stimulating activity； an anti-cancer vaccine comprising said peptide； a DNA having the nucleotide sequence shown in SEQ ID NO: 2, or its complementary sequence or a part or full length of these sequence； an anti-cancer vaccine comprising said DNA； and use thereof.
