PURPOSE: To obtain an infinite pressure generating device which can obtain a high pressure easily, and can be utilized for a press, etc., by using a principle of a pressure transfer of a fluid, and constituting said device so that several pieces of cylinders whose area ratios have been changed are connected, and the pressure can be increased gradually.

CONSTITUTION: By this infinite pressure generating device, an infinite pressure is obtained by applying a pressure 1 from above to a fluid 4 of a prescribed area, using a cylinder 2, and by a proportion of its area ratio. In this case, a workload of the device concerned is obtained by a movement of each cylinder 2 and a piston 3. As for the fluid 4, a solid body or a liquid whose volume is not varied is used. In case, for instance, three pieces of cylinders 2 whose area ratios are 1:100, respectively is connected and used as shown in the figure, when a force of one ton is applied to the first cylinder 2, forces of 100 tons and 10,000 tons can be generated successively by the second cylinder 2 and the third cylinder 2, respectively.