A blood pump system for an artificial heart including: a control unit for controlling a blood pump, the control unit including a first alarm generating part for generating a first alarm signal according to the state of the blood pump, and a speaker for outputting an audible sound upon receiving the first alarm signal when the blood pump is in an abnormal state a supervisory section configured to supervise the state of the control unit a determining section configured to determine whether the control unit is in an abnormal state or not, based on output signal from the supervisory section and a second alarm generating part for generating a second alarm signal according to the state of the control unit, based on the result of determination by the determining section.
