To effectively prevent liquid from leaking from a housing by arranging a leading pipe for respectively communicating and connecting an outlet of an auxiliary pump and an inlet for pressurizing liquid of an ejector device, the way between axial seals and an inlet for leaked liquid of the ejector device, and an outlet for liquid of the ejector device and a reservoir of a pump device with and to each other.

A leaked liquid recovering device is provided with a small sized ejector device 30 having a pressurizing liquid inlet port, a leaked liquid body inlet port, an outlet port, and a venturi throat part, and a liquid leading pipe 40 for communicating and connecting a pressurizing liquid outlet port 14 of a servo control loop functioned as a liquid feed source of an auxiliary pump and an inlet port with and to each other, as major constituting elements. And also the device is provided with a liquid leading pipe 42 for communicating and connecting the leaked liquid inlet port and a leaked liquid recovering range which is formed in an end mount 18 between an oil seal element and an air seal element which are separated from each other, with and to each other. A check valve 48 may be arranged on the liquid leading pipe 42.