The present invention provides a method for producing flavan derivatives having various substituent groups with controlling the stereochemistry. The method of the present invention includes the steps of: hydratively condensing a phenol compound expressed by formula (I) and an alcohol compound expressed by formula (II) to from an epoxide compound of formula (III); opening the epoxy ring of the epoxide compound of formula (III) to form an iodine-containing compound of formula (IV); and cyclizing the iodine-containing compound to form the flavan derivative of formula (V).