A pump device configured to suction and eject fluid by a cyclic-motion part driven by an electric motor to perform a cyclic motion, the pump device comprising: a pump main body containing the cyclic-motion part; a cover body; a stator module including a stator constituting the electric motor; a connector terminal electrically coupled to an external-connected terminal which is externally grounded, at least a portion of the connector terminal being formed of a conductive material; characterized in that a securing part inserted through the stator; to connect the pump main body to the cover body, at least a portion of the securing part being formed of a conductive material; at least a portion of the pump main body is being formed of a conductive material; at least a portion of the cover body is formed of a conductive material; at least a portion of an external of the stator module is being covered with an insulation member having electric-insulating property to electrically insulate the pump main body from the cover body; a load applying means provided between the securing part and the cover body so as to apply a load to the securing part and the cover body, at least a portion of the load applying means being formed of a conductive material; a conductive-elastic member is electrically coupled to the connector terminal and configured to make contact with the cover body as applying a load to the cover body, at least a portion of the conductive-elastic member being formed of a conductive material and a discharge path is being formed through the pump main body, the securing part, the load applying means, the cover body, the conductive-elastic member, and the connector terminal to discharge static electricity to external via the external-connected terminal. a pump main body containing the cyclic-motion part; a cover body; a stator module including a stator constituting the electric motor; a connector terminal electrically coupled to an external-connected terminal which is externally grounded, at least a portion of the connector terminal being formed of a conductive material; at least a portion of the pump main body is being formed of a conductive material; at least a portion of the cover body is formed of a conductive material; at least a portion of an external of the stator module is being covered with an insulation member having electric-insulating property to electrically insulate the pump main body from the cover body; a load applying means provided between the securing part and the cover body so as to apply a load to the securing part and the cover body, at least a portion of the load applying means being formed of a conductive material; a conductive-elastic member is electrically coupled to the connector terminal and configured to make contact with the cover body as applying a load to the cover body, at least a portion of the conductive-elastic member being formed of a conductive material and a discharge path is being formed through the pump main body, the securing part, the load applying means, the cover body, the conductive-elastic member, and the connector terminal to discharge static electricity to external via the external-connected terminal.