invention to follow ejection rate and adjustable pulsating night expenditure type blood pump device, the pulsating blood type a housing for supporting the corner portions of the pump device Disc is supported by the housing An encoder for generating the encoder output indicative of the rotation angle of the disk Cam for rotating the disc relative to the center point of the disc Cam driving motor for driving the cam Connection for connecting the cam disc and the disc Blood receiving space formed therein to accommodate the inflow of blood and received, the received blood foil shipment cylinder The cylinder of the piston inserted in the opening of the blood receiving space to collapse or to expand the blood receiving space Piston connecting portion connecting the upper surface of the upper surface of the predetermined point and the piston of the disk Inlet pipe which blood flows The inlet valve to open or close the accommodating space between the blood and the inlet pipe Chulgwan night that the blood ejection Ejection valve for opening or closing the accommodation space between the blood and the foil chulgwan When the rotation angle of the disc is indicative of the encoder output value present in the first predetermined period, should be in a direction that moves the piston from the cylinder and as well as pre-selected ppe the cam drive motor at a first rotation speed so that the disk is rotated the control and the control for driving the intake valve so as to open the inlet valve, and controls the drive unit so as to close the ejection valve and the ejection valve to be accommodated is the blood flows into the blood receiving space of the cylinder, the said encoder output values When the rotation angle of the disc indicated by the presence in the second predetermined period, the control piston to the cam drive motor so that the disk is rotated at a second rotation speed should be moved to the loading direction and sliding as well as pre-selected from the cylinder, The
