PROBLEM TO BE SOLVED: To provide a production method including a processing method and a sterilization method of leachate from tea leaves of tea beverage, capable of keeping excellent flavor, even when being preserved for a long time without using high temperature.SOLUTION: A production method of tea beverage includes the steps for: (a) sealing tea leachate in a soft container and (b) pressurizing the sealed container for 0.1-10 minutes by a pressure of 100-600 MPa so as to be sterilized. In the production method of tea beverage, the obtained packaged tea beverage can be preserved in refrigeration or at room temperature for a long period, and can maintain excellent flavor even when being preserved for a long period.
