PROBLEM TO BE SOLVED: To provide a blood purification device capable of accurately correcting rotation speeds of a dialysis fluid pump and a waste fluid pump while reducing costs by causing a single weight meter to measure the weight of a dialysis fluid storage bag and a waste fluid storage bag, and also capable of suppressing an error of a flow rate of dialysis fluid introduced to blood purification means.SOLUTION: In a blood purification device equipped with a control part 7 capable of controlling a dialysis fluid pump p2 and a waste fluid pump p3 based on a measurement value of a single weight meter 4, the control part 7 rotationally drives the dialysis fluid pump p2 to allow dialysis fluid in a dialysis fluid storage bag B1 to flow without causing it to be stored in a waste fluid storage bag B2, and, based on a change in the measurement value of the weight meter 4 in the process, causes a correction process for correcting the rotation speed of the dialysis fluid pump p2 to be performed.SELECTED DRAWING: Figure 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
