Tensioning device for maintaining the tension in a cable which serves in particular for holding a privacy screen or sunscreen, comprising: a carrier part for fixing the tensioning device to an underlying surface, wherein the carrier part has a cutout, the orientation of which into the carrier part or through the carrier part is perpendicular to a provided cable-tensioning direction, and a substantially bolt-like clamping part which is introduced into the cutout in the direction of the longitudinal axis of said clamping part perpendicularly to the provided cable-tensioning direction and/or parallel to the orientation of the cutout, wherein the clamping part has at least one passage, extending through the clamping part perpendicularly to the longitudinal axis, for receiving the cable, in particular a gap that extends along the longitudinal axis into the clamping part, characterized in that the clamping part pushed into the cutout in the carrier part is movable between a tensioning state, in which the cable received in the passage is movable in the passage and thus able to be tensioned, and a clamping state, in which the cable received in the passage is clamped between the clamping part and carrier part and thus a tension in the cable is maintained, in that the clamping part has latching elements (8; 10) on its circumferential surface, wherein at least two types of latching elements (8; 10) are provided, wherein at least one first latching element of a first type of latching elements is provided in the region of that end of the clamping part that is oriented towards the carrier part and at least one second latching element of a second type of latching elements is provided in a manner offset at a provided axial spacing along the longitudinal axis with respect to the first type of latching elements, in that the cutout has a substantially cylindrical internal face with a longitudinal axis, wherein at least one catch is formed on the internal face, in that, in the tensioning state, the clamping part is located in a first position in which the at least one first latching element of the clamping part is locked together with the at least one catch of the cutout, and in that, in the clamping state, the clamping part is located in a second position in which the at least one second latching element of the clamping part is locked together with the at least one catch of the cutout. a carrier part for fixing the tensioning device to an underlying surface, wherein the carrier part has a cutout, the orientation of which into the carrier part or through the carrier part is perpendicular to a provided cable-tensioning direction, and a substantially bolt-like clamping part which is introduced into the cutout in the direction of the longitudinal axis of said clamping part perpendicularly to the provided cable-tensioning direction and/or parallel to the orientation of the cutout, wherein the clamping part has at least one passage, extending through the clamping part perpendicularly to the longitudinal axis, for receiving the cable, in particular a gap that extends along the longitudinal axis into the clamping part, characterized in that the clamping part pushed into the cutout in the carrier part is movable between a tensioning state, in which the cable received in the passage is movable in the passage and thus able to be tensioned, and a clamping state, in which the cable received in the passage is clamped between the clamping part and carrier part and thus a tension in the cable is maintained, in that the clamping part has latching elements (8; 10) on its circumferential surface, wherein at least two types of latching elements (8; 10) are provided, wherein at least one first latching element of a first type of latching elements is provided in the region of that end of the clamping part that is oriented towards the carrier part and at least one second latching element of a second type of latching elements is provided in a manner offset at a provided axial spacing along the longitudinal axis with respect to the first type of latching elements, in that the cutout has a substantially cylindrical internal face with a longitudinal axis, wherein at least one catch is formed on the internal face, in that, in the tensioning state, the clamping part is located in a first position in which the at least one first latching element of the clamping part is locked together with the at least one catch of the cutout, and in that, in the clamping state, the clamping part is located in a second position in which the at least one second latching element of the clamping part is locked together with the at least one catch of the cutout.