This invention relates to a resveratrol polymerization compound represented by Formula (1) (in which, in Formula (1), R1 and R2 represent —OH or Formula (2) and R1 and R2 are not the same) or a pharmaceutically acceptable salt thereof and an anticancer agent, an anticancer agent for oral cancer, an antioxidant, an antibacterial agent, a lipase inhibitor, an antiobesity agent, a therapeutic agent for skin diseases, a food, a pharmaceutical agent, a quasi drug, or a cosmetic containing one or more compounds selected from the group consisting of the resveratrol polymerization compound and the pharmaceutically acceptable salt thereof.