To convert water (air) into high-pressure water (air) in great quantities.

Water (air) is put into a round outer box 2 from the outside, and the water (air) in the round outer box 2 is highly compressed. Since water makes use of torque of a compression rotary fitting 3 by using the compression rotary fitting 3, shielding performance and rotating performance of a water (air) inlet and a water (air) outlet when the compression rotary fitting 3 is rotationally moved by using a partition fitting 5, an angle adjusting fitting 6 and a partition contact ring fitting 8 are improved. A check valve 7 is attached. A pipe 1 (inlet pipe) is connected to a tank 18, the compression rotary fitting 3 is rotated to discharge air, the inside of the tank 18 becomes the vacuum state, and therefore, this machine can be used as a vacuum pump.