An object of the present invention is to provide a blood purification device that eliminates the complexity of device preparation operation and reduces the burden of a device user on the basis of ensuring the safety of a patient. The blood purification device (80) of the present invention comprises: a blood pump (81), which supplies blood on an artery side circuit to a blood purifier a dialysate pump (82), which supplies dialysate on a dialysis circuit to the blood purifier a waste liquid pump (83), which discharges the waste liquid on a waste liquid circuit a first pump (84), which supplies replenishment liquid on a first circuit to a vein side circuit, a second pump (85), which supplies displacement liquid on a second circuit to the vein side circuit and a control unit (90), which controls the driving of the pumps. The control unit (90) controls the flow rate of the first pump (84) and the flow rate of the second pump (85) in an operatively linked manner.本發明之目的在於提供一種可消除裝置準備作業之繁雜、並可於確保患者安全性之基礎上減輕裝置使用者之負擔的血液淨化裝置。本發明之血液淨化裝置(80)包含:血液泵(81),其係用以向血液淨化器輸送動脈側電路上之血液;透析液泵(82),其係用以向血液淨化器輸送透析液電路上之透析液;廢液泵(83),其係用以將廢液電路上之廢液送出;第1泵(84),其係用以向靜脈側電路輸送第1電路上之補充液;第2泵(85),其係用以向靜脈側電路輸送第2電路上之置換液;及控制部(90),其對該等泵之驅動進行控制。且控制部(90)連動地控制第1泵(84)之流量與第2泵(85)之流量。80‧‧‧血液淨化裝置81‧‧‧血液泵82‧‧‧透析液泵83‧‧‧廢液泵84‧‧‧第1泵85‧‧‧第2泵86‧‧‧電源部87‧‧‧設定輸入部88‧‧‧顯示部89‧‧‧記憶部90‧‧‧控制部F1‧‧‧泵驅動控制部F2‧‧‧泵流量調整部F3‧‧‧第1連動控制部F4‧‧‧第2連動控制部F5‧‧‧第3連動控制部
