PROBLEM TO BE SOLVED: To provide a cancer detection method using a soluble CD155 protein as an index.SOLUTION: The cancer detection method measures an expression level of the soluble CD155 protein in a biological sample or a gene encoding the protein, and relates a relevant measurement result to a cancer possibility.COPYRIGHT: (C)2011,JPO&INPIT【課題】癌の検出方法の提供。【解決手段】生体試料中の可溶型CD155タンパク質又は該タンパク質をコードする遺伝子の発現量を測定し、当該測定結果と癌の可能性とを関連づけることを特徴とする、癌の検出方法。【選択図】なし