Blood purification apparatus

A blood purification apparatus comprising:

• a blood circuit including an arterial blood circuit to a distal end of which an arterial puncture needle is connectable, and a venous blood circuit to a distal end of which a venous puncture needle is connectable, the blood circuit being capable of extracorporeally circulating blood of a patient;
• a blood purification device provided between the arterial blood circuit and the venous blood circuit of the blood circuit and being capable of purifying the blood flowing through the blood circuit;
• a blood pump provided to the arterial blood circuit and being capable of delivering liquid when activated;
• and
• a control device that executes a connected step in which the blood pump is activated with the arterial puncture needle and the venous puncture needle being stuck in the patient, and an unconnected step in which the blood pump is activated with neither the arterial puncture needle nor the venous puncture needle being stuck in the patient,
• wherein the control device is capable of executing, in the unconnected step, a checking step in which whether the arterial puncture needle and/or the venous puncture needle is not stuck in the patient is checked.