MANN GRAVITY PRIME MOVER is a gravity perpetual Motion Machine. It moves only with the gravitational pull of the earth. MANN GRAVITY PRIME MOVER is a fuel - less prime mover for limitless power generation and other useful purposes. It moves automatically due to gravitational pull of earth. In it the required weight(s) is made to move automatically horizontally in circular motion at the same height from ground level - A NEW THEORY - for 24 hours a day. In it a shaft inclined downward / upward (4-inches per foot approximately) is made to move with weight(s) fitted on levers (s) with the help of a wheel running on a circular runway and the same is used to do mechanical work for power generation and other useful purposes such as pumping of water, running of small machines in industry. At its centre there is a stepped hole in which a ball bearing is made to move in a cup/cover of a taper ball bearing. It enables the movement of main shaft in downward / upward inclination. At the centre a supporting shaft vertical to the main - shaft is provided and a ball bearing at its other end moves in a pulley type ring at suitable depth/ height as per need. It controls the movement of weight (s) and keeps it at the same height from ground level. The supporting shaft is further connected to the pulley fitted at the top of the stand of this prime mover for power generation and to do other necessary work mechanically such as pumping of water, running of machines in industry. With the movement of this Gravity Prime Mover the pulley moves - it further drives a small pulley of gear box and the gear box increases the speed of its couplin. A small generator is directly connected to this couplin for power generation. A large generator is kept by the side of the prime mover and power is generated with the help of helical gear and vertical and horizontal shafts etc. In MANN GRAVITY PRIME MOVER - hydraulic brake is provided to stop it as and when required and a stand may be placed under the weight (s) at that time. With the removal of stand and releasing of hydraulic brake - Gravity prime mover again starts moving at the same speed. The wheel of small MANN GRAVITY PRIME MOVER may be made to move on a circular steel plate - wide enough for its movement. The wheel of a big MANN GRAVITY PRIME MOVER may be made to move on a circular railway line type -single line circular installation.