PURPOSE: To move inner conductive liquid and to obtain a large thrust by arranging many annular exciting coils at an equal interval outside a hollow cylinder, alternately reversing the direction of the magnetomotive forces of the adjacent exciting coils of the same phase, and generating an axially moving magnetic field on the inner surface of the cylinder.

CONSTITUTION: A field core part 4 is disposed outside a nonmagnetic, nonconductive hollow cylinder 5, and exciting coils 1, 2, 3 corresponding to the number of the phases of a power source are equally arranged. When it is excited by polyphase AC, an alternating magnetic field moving longitudinally is generated on the inner surface of the cylinder 5, and an induced current flows in the inner conductive liquid to be moved toward the moving field. Thus, an induction electromagnetic thrust generator which has a simple structure, low noise, easy forward and reverse movements and speed change without generating electrochemical action due to the flow of a large DC current directly to the liquid can be obtained.