PROBLEM TO BE SOLVED: To provide a blood purification device capable of detecting an abnormality of a device at low cost and reducing a cost without providing a dedicated sensor or the like. SOLUTION: A supply liquid circuit, a storage chamber for storing a supply liquid or a drainage liquid of the supply liquid in the supply liquid circuit, and a supply liquid or a storage chamber arranged on the upstream side of the storage chamber in the liquid supply direction in the supply liquid circuit. A liquid introduction pump that introduces drainage, a liquid delivery pump that is located downstream of the storage chamber in the liquid supply direction in the supply liquid circuit and draws out the supply liquid or drainage from the storage chamber, and detects the remaining amount in the storage chamber. The detection unit and the amount of supply or drainage introduced into the storage chamber by the liquid introduction pump, the amount of supply or drainage led out by the liquid delivery pump to the storage chamber, and the balance of the storage chamber detected by the detection unit. It is provided with an abnormality detection unit that detects an abnormality in the liquid feeding state of the supply liquid circuit based on the amount. [Selection diagram] Fig. 1【課題】専用のセンサ等を具備することなく安価に装置の異常を検出することができ、コストを低下することができる血液浄化装置を提供する。【解決手段】供給液回路と、供給液回路において供給液または供給液の排液を貯留する貯留チャンバと、供給液回路において貯留チャンバの送液方向上流側に配置され、貯留チャンバに供給液または排液を導入する液導入ポンプと、供給液回路において貯留チャンバの送液方向下流側に配置され、貯留チャンバから供給液または排液を導出する液導出ポンプと、貯留チャンバの残量を検出する検出部と、液導入ポンプが貯留チャンバに導入する供給液または排液の導入量、液導出ポンプが貯留チャンバに導出する供給液または排液の導出量、及び検出部が検出する貯留チャンバの残量に基づいて、供給液回路の送液状態の異常を検出する異常検出部と、を具備する。【選択図】図１
