Provided is a blood purification device whereby setting operations for blood purification treatment or preparations therefor can be simply and smoothly performed. A blood purification device that is provided with a blood purification circuit (1) that has an artery-side blood circuit (1a) and a vein-side blood circuit (1b) that constitute a blood circuit, with a dialyzer (2) that is for purifying blood that circulates extracorporeally in the blood circuit, and with a dialysis device main body (8). The blood purification device is also provided with an identification means (α, β) that can identify characteristic information that includes conditions for the use of the blood purification circuit (1) or the dialyzer (2) when blood purification treatment or preparations therefor are performed, with a reading means (13) that can read the characteristic information of the identification means (α, β), and with a control unit (17) that performs blood purification treatment or preparations therefor on the basis of the conditions for use in the characteristic information that is read by the reading means (13).La présente invention concerne un dispositif de purification de sang, dans lequel des opérations de réglage pour un traitement de purification de sang ou des préparation pour ce dernier peuvent être réalisées simplement sans à-coups. L'invention concerne un dispositif de purification de sang, qui comprend un circuit de purification de sang (1) qui comporte un circuit sanguin côté artère (1a) et un circuit sanguin côté veine (1b), qui constituent un circuit de sang ； un dialyseur (2) qui est destiné à purifier le sang qui circule par voie extracorporelle dans le circuit sanguin ； et un corps principal de dispositif de dialyse (8). Le dispositif de purification de sang comprend également un moyen d'identification (α, β) qui peut identifier des informations de caractéristiques qui comprennent des conditions d'utilisation du circuit de purification de sang (1) ou du dialyseur
