A swimming exerciser has a vertical support, an arm, a roller assembly, a resilient element, a belt, a resilient tether and a rope. The vertical support is mounted beside a swimming pool and has a pulley. The arm is hollow and is connect to and protrudes from the vertical support and has a distal end. The roller assembly is mounted moveably inside the arm. The resilient element is mounted inside the arm between the roller assembly the distal end of the arm. The belt is worn around a person's waist. The resilient tether is attached to the roller assembly and the belt and compensates for a swimmer's lack of movement through the water to hold the swimmer at a constant depth. The rope is connected to the roller assembly, reeved through the pulley and connected to the belt to hold a swimmer in a fixed position when swimming.