<;P>;PROBLEM TO BE SOLVED: To provide a floating landing stage with a water quality improvement function, which is expected to have water quality improvement (suppression of red tide by abnormal occurrence of planktons) in a surrounding water area without having an effect on ship sailing and fishing, simply sets shellfishes and alga in water, simply recovers them from water and prevents shellfishes and algae from dropping off. <;P>;SOLUTION: The floating landing stage 1 configured to include a floating body structure 10 floating on water in which basket storage portions 16 opening at the top surface 11 and the bottom surface are formed inside the floating body structure 10, net baskets storing shellfishes and algae are detachably attached to the insides of the basket storage portions 16 so that the net baskets 20 are made while being immersed in water. <;P>;COPYRIGHT: (C)2010,JPO&INPIT