PURPOSE: To provide a low noise oil pressure pump device capable of reducing noise effectively by self adjusting control quantity following up a large variation of an operation condition of the oil pressure.

CONSTITUTION: A low noise oil pressure pump device is provided with a variable capacity type oil pressure pump device 1 having a cam plate 2, discharge quantity setting devices 3, 4 for setting a discharge quantity of the pump 1 by varying tilting angle of the cam plate 2, a pressure detector 6 for detecting variation of the discharge pressure of the pump 1, a noise detector 7 for detecting noise generated from the pump 1 and a controller 5 for providing output of a discharge quantity setting signal to the discharge quantity setting device. Thereby, the controller 5 eliminates the noise generated from the pump 1 according to the output signal of the pressure detector 6 and that of the noise detector 7, calculates by an actual time minimized by caucelling the noise generated by the pump 2 cam plate control signal and outputs the signal by superimposing it to the discharge quantity setting signal.