PROBLEM TO BE SOLVED: To accurately correct the rotation speeds of a dialysate pump and a drainage pump while reducing the cost by measuring the weight of the dialysate containing bag and the drainage containing bag with a single weighing scale. , Provide a blood purification device capable of suppressing an error in the flow rate of a dialysate to be introduced into a blood purification means. SOLUTION: In a blood purification device including a control unit 7 capable of controlling a dialysate pump P2 and a drainage pump P3 based on a measurement value of a single weighing scale 4, the control unit 7 controls the dialysate pump P2. The dialysate in the dialysate storage bag B1 is rotationally driven to flow without being stored in the drainage storage bag B2, and the rotation speed of the dialysate pump P2 is based on the change in the measured value of the weight scale 4 in the process. It is possible to perform a correction step for correcting the above. [Selection diagram] Fig. 1【課題】単一の重量計にて透析液収容バッグ及び排液収容バッグの重量を計測させることによりコストを低下させつつ透析液ポンプ及び排液ポンプの回転速度を精度よく補正することができるとともに、血液浄化手段に導入する透析液の流量の誤差を抑制することができる血液浄化装置を提供する。【解決手段】 単一の重量計４の計測値に基づいて透析液ポンプＰ２及び排液ポンプＰ３を制御可能な制御部７を具備した血液浄化装置において、制御部７は、透析液ポンプＰ２を回転駆動させて透析液収容バッグＢ１内の透析液を排液収容バッグＢ２に収容させることなく流動させ、その過程における重量計４の計測値の変化に基づいて、当該透析液ポンプＰ２の回転速度を補正する補正工程を行わせ得るものである。【選択図】図１
