An infusion delivery pump comprising: a pump housing; a plunger, wherein the pump housing and the plunger bound a pump chamber, the plunger is reciprocally movable inwardly and outwardly of the pump housing thereby increasing and decreasing the volume of the pump chamber; a plunger drive for driving displacement of the plunger relative to the pump housing, the plunger drive being coupled to the plunger; a supply conduit communicating with the pump chamber for delivering infusion liquid from a reservoir, such as an IV bag, into the pump chamber; a delivery conduit communicating with the pump chamber for receiving and delivering infusion liquid from the pump chamber; at least one pump valve via which the supply conduit communicates with the pump chamber, while the delivery conduit is shut off from the pump chamber, if the pump valve is in an infusion intake condition and via which the delivery conduit communicates with the pump chamber, while the supply conduit is shut off from the pump chamber, if the pump valve is in an infusion delivery condition; at least one pump valve actuator; and a control unit arranged and connected for controlling the plunger drive and the pump valve actuator; wherein the plunger drive, the pump valve actuator and the control unit are part of a base unit; wherein the pump housing, the plunger, at least a downstream portion of the supply conduit and at least one upstream portion of the delivery conduit and the at least one pump valve are part of a disposable unit removably attached to the base unit, the coupling of the at least one pump valve to the at least one pump valve actuator and the coupling of the at least one plunger to the plunger drive being releasable, characterized by: a further plunger, wherein the pump housing and the further plunger bound a further pump chamber, the further plunger is reciprocally movable inwardly and outwardly of the pump housing thereby increasing and decreasing the volume of the further pump chamber, and wherein the plunger drive is arranged for simultaneously driving the plungers (3, 4) in opposite directions. a pump housing; a plunger, wherein the pump housing and the plunger bound a pump chamber, the plunger is reciprocally movable inwardly and outwardly of the pump housing thereby increasing and decreasing the volume of the pump chamber; a plunger drive for driving displacement of the plunger relative to the pump housing, the plunger drive being coupled to the plunger; a supply conduit communicating with the pump chamber for delivering infusion liquid from a reservoir, such as an IV bag, into the pump chamber; a delivery conduit communicating with the pump chamber for receiving and delivering infusion liquid from the pump chamber; at least one pump valve via which the supply conduit communicates with the pump chamber, while the delivery conduit is shut off from the pump chamber, if the pump valve is in an infusion intake condition and via which the delivery conduit communicates with the pump chamber, while the supply conduit is shut off from the pump chamber, if the pump valve is in an infusion delivery condition; at least one pump valve actuator; and a control unit arranged and connected for controlling the plunger drive and the pump valve actuator; wherein the plunger drive, the pump valve actuator and the control unit are part of a base unit; wherein the pump housing, the plunger, at least a downstream portion of the supply conduit and at least one upstream portion of the delivery conduit and the at least one pump valve are part of a disposable unit removably attached to the base unit, the coupling of the at least one pump valve to the at least one pump valve actuator and the coupling of the at least one plunger to the plunger drive being releasable, characterized by: a further plunger, wherein the pump housing and the further plunger bound a further pump chamber, the further plunger is reciprocally movable inwardly and outwardly of the pump housing thereby increasing and decreasing the volume of the further pump chamber, and wherein the plunger drive is arranged for simultaneously driving the plungers (3, 4) in opposite directions.