The present invention provides a melanogenesis inhibitor and skin-whitening agent, more particularly, a melanogenesis inhibitor and skin-whitening agent containing a chemical represented by the formula C30H22O10 (2,2,3,3-Tetrahydro-5,5,7,7-tetrahydroxy-2,2-bis(4-hydroxyphenyl)-3,3-bi[4H-1-benzopyran]-4,4-dione, which is commercially available from the AnalytiCon company. The disclosed preparation can be used in conventional form use, e.g. cosmetics, medicine, etc. or can be made into food or drink.