Hydraulic Brake

A hydraulic brake being used to a handle of a two wheel vehicle and comprising a body, a hydraulic cylinder, a hydraulic piston, a holder, and an adjustable nut, and the handle, wherein the body includes two first tabs disposed on an upper side thereof, the handle includes an axial hole and a through bore to receive the adjustable nut arranged on a front end thereof, the adjustable nut includes a screw aperture formed on a middle section thereof to be screwed with first threads of a connecting post of the hydraulic piston, the body includes a retaining sleeve and two second tabs disposed on a bottom side thereof, the hydraulic cylinder includes an oil chamber fixed on a central portion thereof and is fitted to the holder, a positioning nut having an orifice is screwed with second threads on a top end of the hydraulic cylinder so that the hydraulic piston is limited in the oil chamber to operate and the holder is not disengaged, the holder includes a receiving room to receive an oil cup and a pore arranged thereon, and includes a cover disposed to one side thereof, an outer diameter of the pore of the holder is equal to that of the hydraulic cylinder, the pore is used to receive the hydraulic cylinder so that the hydraulic cylinder is connected with the oil cup, the hydraulic piston includes the connecting post disposed on a rear end thereof, and the connecting post includes the first threads arranged thereon to screw the connecting post with the orifice of the positioning nut.