To provide a method for preventing the occurrence of green smell of a fruit flavor food without spoiling its taste quality.

This method for preventing occurrence of green smell of fruit flavor food has been completed by finding out that green smell of fruits or vegetables is prevented by adding as a substitute for aspartame, neotame as one kind of amino acid-based sweetener to fruit flavor food or vegetable flavor food. The method allows the prevention of the occurrence of green smell felt in fruit flavor food without spoiling the taste quality, and also enables the suppression of the flavor deterioration with the lapse of time.