Blood Purification Apparatus

A blood purification apparatus comprising:

• a blood circuit with an arterial blood circuit and a venous blood circuit to extracorporeally circulate blood of a patient from a distal end of the arterial blood circuit to a distal end of the venous blood circuit;
• a blood purification device is interposed between the arterial blood circuit and the venous blood circuit of the blood circuit, the blood purification device purifies the blood flowing in the blood circuit;
• a blood pump is arranged in the arterial blood circuit and enables a liquid in the blood circuit to flow in a rotation direction;
• and
• a control device performs a negative pressure applying process to release a negative pressure after applying the negative pressure to a flow route of an upstream side from an arrangement position of the blood pump in the arterial blood circuit.