To solve the problem that an engine as a motive energy burns mainly a petroleum-based fuel and exhausts harmful exhaust gas, thereby the engine pollutes the atmosphere and is greatly responsible for environmental deterioration, and consumes limited petroleum resource merely as a fuel.

A circularly formed magnetism facing motor includes: magnets of S pole and N pole arranged at a constant interval in the inner face of a cylindrical outer tube; and movable magnets each having an S pole and an N pole on its both ends respectively, the each movable magnet being fixed with a pin rotatably within a magnetic field range formed by the magnets in the inner face of the cylindrical outer tube. Magnetic force shielding rotation boards rotating through between the facing magnets shield both actions of repelling magnets and attracting magnets at a constant time interval, thereby tips of the movable magnets radially move alternatively. This movement force is transmitted to a central rotation crank via displacement amplification plates and connection rods. The repetitive radial movement of a combination set consisting of facing magnet devices at two positions radially spaced or rotative direction spaced, is converted to one rotating movement. Consequently, a strong and stable continuous engine can be obtained by only arranging the plurality of above sets in one apparatus and rotating the magnetic force shielding rotation boards.