PURPOSE: To obtain a perpetual power engine without requiring fuel by interlocking a magnet shaft gear arranged within a main body and a gear engaging with the former gear to rotate a rotor.

CONSTITUTION: A main body 2 of perpetual engine is mounted on a body mount 1 and a round block 3 equipped with a crook is fitted into said main body. A magnet having S pole 5 and N pole 4 is inserted into this block 3 and a gear 19 is secured to a shaft 10 of said magnet so that the magnet is rotatably formed. Within the main body, moreover, a rotor 8 is rotatably provided and is constituted so that gears 9, 19, 20 secured to a shaft 14 of said rotor 8 are made to engage with each other, and the N pole 4 and S pole of each magnet are caused to rotate to repeat attraction, semiattraction and non-attraction. As a result, the rotor 8 can be made to continue its rotation.