PURPOSE: To endlessly use the pollution-free power without using fuel by rotating a shaft, taking advantage of the distance, in which a body falls on account of the gravitational force of the earth, as well as the weight of the body and taking advantage of a magnet for repulsion as a supplement.

CONSTITUTION: When a roller 5B is disconnected from a roller receiving plate 9, a slide main body 4 falls on account of its own weight, and, when a spring 14 is stopped by a stopper 15, the roller 5B moves to the position 5A, A rack 7 rotates a gear 8 by the distance corresponding to the moving range of the roller 5B, thereby rotating a shaft 10. As a result, a gear 11 rotates a gear 12, thereby rotating shaft 2. Thus, since the parts belonging to the shaft 2 are all rotated, a roller 5C moves to the position 5B, thereby being disconnected from the roller receiving plate 9. This motion is reiterated. In addition, in order to ensure smooth and strong rotation, a plugging device (a magnet for repulsion) 17 is provided. Thus, the power from the rotating shaft 10 can be utilized endlessly.