To provide a hydraulic device capable of supplying a large amount of operating fluid while saving energy.

This hydraulic device 1 includes a plurality of pump units 5, and a confluence passage 7 through which operating fluid delivered from the plurality of pump units 5 flows. A first pump unit 5A includes a first motor 11A driving both a first pump 9A and a second pump 9B, a first check valve 23A arranged in a passage 13A for the first pump extending from the first pump 9A, and a first unload relief valve 25A arranged in a passage 13B for the second pump extending from the second pump 9B. The passage 13A for the first pump and the passage 13B for the second pump join each other, and no check valve is arranged in a first unit passage 15A which joins the confluence passage 7.