The invention relates to an eccentric screw pump (1) for delivering liquids loaded with solids, having a rotor (4) wound helically, a stator (2), having an inlet (10) and an outlet (12), in which therotor (4) is rotatably arranged about a longitudinal axis (L1) of the stator, and which has a screw-like inner wall (8) corresponding to the rotor (4), wherein the rotor has a form tapering toward theoutlet (12) or the inlet (10), preferably a conical form and/or a varying eccentricity (e1, e2), and wherein rotor (4) and stator (2) are arranged relative to each other and formed such that at leastone chamber (5) is formed, which is used for conveying the liquid, and the chamber is separated off by a narrowing (7) in particular a sealing line (D). The invention is characterized by an adjustingdevice for adjusting an axial relative position of rotor (4) and stator (2), wherein the adjusting device (39) is designed to widen the narrowing (7) between rotor (4) and stator (2).