To provide an underwater fresh flower in a PET bottle which fills the fresh flower in the bottle, fully fills water in the bottle and sets a cap to the bottle so as to allow the vivid underwater fresh flower to be enjoyed and to allow the flower to be pleasant at any place.

The underwater fresh flower of the PET bottle comprises the fresh flower (1) bound at its lower end with a fishing gut (2), which is bound at other end to a small stone (3) in such a manner that the flower (1) and the gut (2) are filled in the bottle (4), water (5) fully filled in the bottle (4), and the cap (6) set to the bottle.