HYDRAULIC DEVICE

PROBLEM TO BE SOLVED: To provide a hydraulic device which can be installed even in a small installation space and allows its easy assembly and maintenance/inspection work.SOLUTION: The hydraulic device includes: a casing 1 wherein a hydraulic tank 2 is installed on the upper side and a housing chamber 4 is installed on the lower side; and a hydraulic unit 18 wherein a hydraulic pump 22 and a valve device 24 are layered in sequence to be integrated together in the axial direction of an electric motor 20 is housed in the housing chamber 4 with the axial direction oriented in the vertical direction. In the lower end of the hydraulic unit 18, a mounting member 26 is arranged integrally, and the mounting member 26 is placed on leg members 28 and 30 arranged in the housing chamber 4 to form a working space 34 below the mounting member 26. The leg members 28 and 30 and the mounting member 26 are installed removably. In this process, the leg members 28 and 30 attached to a bottom plate 12 of the casing 1 are installed vertically in the housing chamber 4, and the mounting member 26 is placed on the leg members 28 and 30 to be attached removably. The leg members 28 and the mounting member 26 are screwed so that they can be attached/detached by rotation around the axis parallel to the axial direction of the electric motor 20.