Problem to be solved: to provide a blood purifying apparatus capable of recovering the blood plasma and replenishment solution remaining in the line after the blood purification treatment and suppressing the sending of bubbles to the patient side.A blood circuit 2 for circulating the patient's blood in the extracorporeal circulation is providedPlasma purified after plasma purification separated by plasma separatorOr, a chamber 27 for introducing a plasma replenishment solution separated by a plasma separator into the blood circuitAfter the purification or plasma solution or replenishment liquid can be fed into the chamberAn air introduction part 9 capable of introducing air to the liquid feed line 3 andThe liquid level adjustment part 8 capable of adjusting the liquid level height in the chamberAt the end of blood purification treatmentAir is introduced into the liquid feed line 3 by the air introduction partLiquid or replenisher after the purification is delivered to the chamber 27 through the delivery line 3, andA control section 7 for performing liquid collection processing for maintaining the liquid level in the chamber 27 at a predetermined liquid level height by the liquid level adjusting section 8 andWas provided.Diagram【課題】血液浄化治療後に、ラインに残った血漿や補充液を回収でき、かつ、患者側に気泡を送ってしまうことを抑制可能な血液浄化装置を提供する。【解決手段】患者の血液を体外循環させる血液回路2に設けられ、血漿分離器26で分離された血漿を浄化した浄化後の血漿、または血漿分離器で分離された血漿の補充液を血液回路2に導入するチャンバ27と、浄化後の血漿または補充液をチャンバ27に送液可能な送液ライン3と、送液ライン3にエアーを導入可能なエアー導入部9と、チャンバ27内の液面高さを調整可能な液面調整部8と、血液浄化治療の終了時に、エアー導入部9により送液ライン3にエアーを導入しつつ、送液ライン3を介してチャンバ27に浄化後の血漿または補充液を送液すると共に、液面調整部8によりチャンバ27内の液面高さを所定の液面高さに維持する液回収処理を行う制御部7と、を備えた。【選択図】図1