Provided is a method for easily producing a polyphenol composition in a solid state having an excellent solubility in water. The method for producing the polyphenol composition comprises the following steps (1) and (2): (1) heating a mixture of a hardly water-soluble polyphenol (A) and a water-soluble polyphenol (B) to a temperature equal to or higher than the lowest melting point or glass transition temperature of the hardly water-soluble polyphenol (A) or the water-soluble polyphenol (B), thereby obtaining a heat-treated solution, and (2) cooling and solidifying the thus-obtained heat-treated solution.