A floating aquatic stair stepper (1) having a frame (2) with support bars (6, 7), two extension legs (4) secured to the frame (2) and two foot placement steps (3) movably secured to each extension leg (4). The support bars (6, 7) permit a user to comfortably rest his or her hands, arms and shoulders, thereby permitting him or her to float. The foot placement steps (3) are each preferably slidably secured to extension legs (4). To use, a person raises and lowers each foot so as to simulate climbing stairs. The extension legs (4) may be fixedly secured to the frame (2) to provide for upward and downward movement only, or pivotally secured to the frame (2) to provide forward and backward movement of the legs as well. To further intensify the up and down movement of the present invention, resistance bands (5) may be used to secure the frame (2) to the foot placement steps (3).