Abstract: A submersible toy comprised of an upper body portion and a watertight lower body portion coupled to said upper body portion, the upper body portion having a first horizontal rudder on the periphery thereof and a float disposed inside thereof, the lower body portion having a motor and a cell disposed inside thereof, a propeller mounted on a rotary shaft of the motor and a vertical and a second horizontal rudder disposed at the rear of the propeller. With this construction, the submersible toy can alternatingly cruise under water and on the surface.