The invention relates to a mass transfer device (1) for intracorporal use, comprising a cavity (3) for receiving blood, said cavity comprising at least one blood inlet (8, 9) and at least one blood outlet (10, 11)； a mass transfer membrane (4) which adjoins the cavity (3)； a supply line (5) for supplying a transfer fluid to the mass transfer membrane (4)； a blood pump (6) arranged in the cavity (3)； and a drive unit (7) for the blood pump (6). The blood pump (6) is designed to pump blood in the direction of a blood inlet (8, 9) to a blood outlet (10, 11) of the cavity (3), wherein the drive unit (7) has a turbine (19) which is connected to the supply line (5) and can be driven by means of a transfer fluid supplied through the supply line (5), and the turbine (19) has at least one impeller (21) which is coupled to the blood pump (6) and a stator (22) which is arranged in front of the impeller (21).
