PURPOSE: The rotating aquatic solar energy generating apparatus establishes the solar energy generating apparatus in the aquatic. The efficiency drop by the geothermal heat is prevented. CONSTITUTION: A post(10) is that the fixing unit(12) is formed in the bottom of the cylindrical rod(11). The fixing unit is fixed to the floor side of underwater. It always exposes to on water and the top of post supports the drifting rigid frame. The center support part(22) is formed in the center of body of post.