A blood pump (1) comprises a pump casing (2) having a blood flow inlet (21) and a blood flow outlet (22), and an impeller (3) arranged in said pump casing (2) and rotatably supported in the pump casing (2) by a bearing (60) so as to be rotatable about an axis of rotation. The impeller (3) has blades (31, 32) for conveying blood from the blood flow inlet (21) to the blood flow outlet (22). The bearing (60) comprises at least one stationary bearing portion (4) coupled to the pump casing (2) and having a stationary bearing surface (61) that faces radially outwards. The bearing (60) further comprises a rotating bearing surface (62) interacting with the stationary bearing surface (61) to form the bearing (60), wherein the rotating bearing surface (61) faces radially inwards and is formed on an exposed radially inner edge (50) of the blade (32).
