Disclosed is a blood pump apparatus (1) including a housing (2) having a blood inlet port (6) and blood outlet port (7), a pump unit (12) including an impeller (8) that rotates within the housing, and an impeller rotational torque generation section (13). The housing (2) includes a plurality of magnetic members (54) embedded between the impeller (8) and the impeller rotational torque generation section (13) for transmitting a magnetically attractive force generated by the impeller rotational torque generation section (13) to an impeller body (25). The pump device (1) includes a non-contact bearing mechanism for rotating the impeller without contacting with the inner surface of the housing when the impeller is rotated by the impeller rotational torque generation section (13).
