PROBLEM TO BE SOLVED: To provide a green juice improver for green beverage for achieving two requirements that seem to be contrary, that ordinary consumers who have not drunk green juice so often also can drink green juice easily by suppressing a smell unique to green juice, and that consumers who often drink green juice also can drink green juice and taste green juice taste, and to provide a packed beverage including the same, and to provide a method for improving green juice taste in the green beverage.SOLUTION: By adding broccoli powder to green beverage such as green juice which has been adjusted so that ordinary consumers also can drink it easily, a smell unique to green juice is suppressed and the easiness of drinking is maintained. In addition, consumers who often drink green juice can taste green juice taste.