The present invention addresses the problem of providing a reduced-calorie fruit juice or vegetable juice beverage, which is produced by reducing the calorie of a fruit juice or vegetable juice beverage, such as a 100% fruit juice or vegetable juice beverage, while maintaining the favor and juice liquid properties of fruit juice or vegetable juice. To solve this problem, there is provided a reduced-calorie fruit juice or vegetable juice beverage which maintains the flavor and juice liquid properties of fruit juice or vegetable juice, the reduced-calorie fruit juice or vegetable juice beverage being produced by treating the fruit juice or vegetable juice with a crude enzyme preparation of fructosyl transferase having substantially no pectinase activity.
