Blood filtering device (1), comprising: * a filter body (3； 103), having an inlet port (4； 104) for blood to be filtered； * a delivery flexible hose (5； 105) of the blood to be filtered, apt to be connected to said inlet port (4； 104) and to further ducts linked to a circulatory system； * peristaltic pump means (10； 105, 109, 114, 115, 117, 118, 143, 144, 145), wherein a case (16； 116) forms at least one peristaltic pump rotor chamber (13； 114), apt to house inside a portion of said delivery flexible hose (5； 105) for obtaining a peristaltic effect, wherein said case (16； 116) defines means for maintaining said filter body (3； 103) in a working position.
