Abstract: A coenzyme Q10-containing water soluble composition comprises coenzyme Q10, a hydrophilic polyglycerol fatty acid ester, a lipophilic sucrose fatty acid ester and an aqueous phase component and a process for producing the same are disclosed. A coenzyme Q10-containing water-soluble dry powder can be obtained by drying the above-mentioned coenzyme Q10-containing water soluble composition. A food, functional food, beverage, pharmaceutical product, quasi drug, cosmetic, or animal food can be obtained by using the above-mentioned coenzyme Q10-containing water soluble composition or the above-mentioned coenzyme Q10-containing water-soluble dry powder. The coenzyme Q10-containing water soluble composition has a high bioavailability, and maintains a stable emulsion form for a long period of time from refrigeration temperature to room temperature and allows efficient supply.