Fluid equipment comprising a container capable of having a first fluid and a second fluid housed therein and including a cylindrical shell having openings at both ends, an oil port member welded and fixed to close one end of the shell, and a cover member welded and fixed to close the other end of the shell, the fluid equipment further comprising a first fluid outlet/inlet path provided at the oil port member of the container for outflow and inflow of the first fluid, a second fluid outlet/inlet path provided at the cover member of the container for outflow and inflow of the second fluid, and a moving member including a guide portion contacting an inner periphery of the cylindrical shell and capable of moving in the cylindrical shell in response to a pressure of the first fluid, the fluid equipment transmitting energy from the first fluid to the second fluid, the fluid equipment further comprising a first bellows capable of expanding and contracting and a second bellows capable of expanding and contracting, the first bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to an inner surface part of the oil port member in a sealed state, an inside of the first bellows being capable of communicating with the first fluid outlet/inlet path, wherein the first fluid and the second fluid are non-compressible fluid, wherein the second bellows has a smaller diameter than that of the first bellows and is configured such that a first end portion of the second bellows is closed by the moving member, a second end portion of the second bellows is fixed to an inner surface part of the cover member in a sealed state, and the non-compressible second fluid is sealed inside, wherein there is a first fluid chamber being set inside the first bellows and communicating with the first fluid outlet/inlet path, wherein there is a second fluid chamber being set inside the second bellows and communicating with the second fluid outlet/inlet path, wherein the second fluid outlet/inlet path for outflow/inflow of the second fluid from/to the second fluid chamber is provided at the substantially center of the cover member in a radial direction, wherein a communication path is provided at the guide portion, said communication path penetrating the guide portion in a thickness direction and communicating with an outside of the first bellows, wherein a gas sealing port for injecting gas such as nitrogen gas into a gas chamber set outside the second bellows is provided on an outer diameter side of the cover member, and is closed by a gas plug after gas injection. the fluid equipment further comprising a first bellows capable of expanding and contracting and a second bellows capable of expanding and contracting, the first bellows having a first end portion closed in a sealed state by the moving member and a second end portion fixed to an inner surface part of the oil port member in a sealed state, an inside of the first bellows being capable of communicating with the first fluid outlet/inlet path, wherein the first fluid and the second fluid are non-compressible fluid, wherein the second bellows has a smaller diameter than that of the first bellows and is configured such that a first end portion of the second bellows is closed by the moving member, a second end portion of the second bellows is fixed to an inner surface part of the cover member in a sealed state, and the non-compressible second fluid is sealed inside, wherein there is a first fluid chamber being set inside the first bellows and communicating with the first fluid outlet/inlet path, wherein there is a second fluid chamber being set inside the second bellows and communicating with the second fluid outlet/inlet path, wherein the second fluid outlet/inlet path for outflow/inflow of the second fluid from/to the second fluid chamber is provided at the substantially center of the cover member in a radial direction, wherein a communication path is provided at the guide portion, said communication path penetrating the guide portion in a thickness direction and communicating with an outside of the first bellows, wherein a gas sealing port for injecting gas such as nitrogen gas into a gas chamber set outside the second bellows is provided on an outer diameter side of the cover member, and is closed by a gas plug after gas injection.