To provide a guava leaf extract powder which exhibitsless deterioration in quality and functions after storage ofthe solution thereof for a long period of time.The invention provides a method for producing a guavaleaf extract powder, including extracting guava leaves withhot water at 90 to 98°C; concentrating the obtained extractto a Brix level of 20 to 30; and lyophilizing theconcentrated extract, and a guava leaf extract powderproduced through the method.