PURPOSE: A fruit bag including a locking device is provided to simply and easily cover an immature fruit with the bag by a single operation of coupling a fastening unit. CONSTITUTION: A fruit bag(10) including a locking device comprises the following: an outer bag(11) including an inner bag(13) inside the inner edge; perforated lines(15) formed on the surface of the outer bag; a drain hole(17) formed on both edge units of the outer bag; a tension device(20) formed on an upper opening of the fruit bag, including a first tension unit(21) and a second tension unit(25); and a male profile track(23) and a female profile track(27) formed on the inner horizontal surface of the tension units.
