A method for producing a flavonoid inclusion compound, including a cleaving step including treating a sparingly soluble flavonoid having a 5 rhamnoside structure with an enzyme having a rhamnosidase activity in the presence of a cyclodextrin to cleave a rhamnose. According to the production method of the present invention, a flavonoid inclusion compound and a composition of flavonoid glycosides having excellent solubility in water can be efficiently produced, so that the compound and composition can be suitably 10 utilized in the fields of medicaments, foodstuff, health foods, foods for specified health use, cosmetics, and the like.