Device for conveying a flowable conveyor mass, in particular a mixture of building materials such as mortar, comprisinga) an eccentric screw pump (1) with a stator (3) and with a in the stator about an axis of rotation (a) is eccentrically rotating or rotatable rotor (2) having a drive shaft of a motor is detachably coupled, wherein the eccentric worm-gear pump in the case of rotation of the rotor in a funding of rotation (d) the conveyor mass (m) in a conveying direction (fr) by the stator and at a first end (8) of the rotor a pump pressure is generated and the opposite rotation in a for funding of rotation (d) of the opposite return of rotation (r) at the first end of the rotor generates a suction pressure,b) further comprises in the direction of conveying the stator of the eccentric screw pump which is arranged downstream of the output part (7) with at least one in a wall of the initial part intended outlet opening (11) for the outlet of the conveyor mass from the output part to a a discharge means (10), andc) further comprising at least one supporting element arranged in the output part (9) with a run-on surface (14) for the first end of the rotor upon a rotation of the rotor in the return of rotation,d), wherein the supporting element is arranged centrally in the region of the axis of rotation, so that the axis of rotation by the sloping surface and the first end of the rotor on the run-on surface during the rotation in the return of rotation is supported to slide thereupon ande) wherein the supporting element on the wall (w) of the initial part is fastened detachably.
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