A blood pump device comprises a housing having a blood inflow port and a blood outflow port, an impeller having a magnetic body or bodies and rotated in a non-contact state in relation to the inside surface of the housing to feed blood, an impeller rotating torque generating section for attracting the impeller from the outside of the housing and rotating the impeller, and a non-contact type bearing mechanism enabling the rotation in the non-contact state of the impeller inside the housing. An impeller fixing member is detachably mounted to the housing and prevents the impeller from moving inside the housing, whereby the impeller can be prevented from moving inside the housing before use, and damage to the impeller or the housing inside surface can be avoided.
