Disclosed are a novel therapeutic agent and a novel treatment method for cancer. Specifically disclosed are: a targeting agent for a cell selected from the group consisting of a cancer cell and a cancer-associated fibroblast, which comprises a retinoid； a substance delivery carrier for the cell, which comprises the targeting agent； an anti-cancer composition utilizing the targeting agent or the carrier； an anti cancer-associated fibroblast composition； and a method for treatment of cancer.
