PROBLEM TO BE SOLVED: To provide a fluid supplying device capable of supplying continuously fluid under application of one cylinder.SOLUTION: This invention relates a fluid supplying device utilizing one fluid cylinder and more particularly a fluid supplying device utilizing a cylinder capable of supplying fluid continuously under utilization of either pneumatic or hydraulic cylinder. The fluid supplying device utilizing the cylinder of this invention is characterized in that each of pumps is oppositely faced to each other and arranged at both sides, one cylinder is arranged at one of them and fluid is supplied continuously in an alternative manner from both side pumps through an upward or downward motion of a cylinder shaft. That is, fluid is supplied alternately in sequence from both side pumps through one cylinder and the fluid is continuously supplied without any interruption.
