A suction device for use in a papermaking machine and being suitable for acting on a wet fibrous web (W) through a permeable fabric that runs through a part of the papermaking machine , the suction device having a length (L) that extends from a first end to a second end which first end is an upstream end when the suction device is used in the papermaking machine and which second end is a downstream end when the suction device is used in the papermaking machine , the direction from the first end to the second end being the machine direction (MD) when the suction device is used in the papermaking machine , the suction device further having a width (B) which is perpendicular to the length (L) of the suction device and extends in the cross-machine direction when the suction device is used in the papermaking machine , the suction device further having a surface which, during use of the suction device in the papermaking machine, will be facing the permeable fabric and thus be a fabric-facing surface , the fabric-facing surface having a first part which begins at the first end of the suction device and extends towards the second end but ends before the second end of the suction device, the first part of the fabric-facing surface being formed by a plurality of planar surfaces which planar surfaces constitute end surfaces of a plurality of solid elements , the planar surfaces of the solid elements in the first part of the fabric-facing surface lying in the same plane such that, during operation, they can contact a fabric gliding over the fabric-facing surface along a straight path, the solid elements being separated from each other along the length of the suction device such that channels are defined between the solid elements , the suction device being configured to be connected to at least one source of underpressure in such a way that the at least one source of underpressure is in communication with the channels defined between the solid elements such that, when the suction device is used and the permeable fabric runs over the fabric-facing surface , the suction device can act on the permeable fabric through the channels and draw the permeable fabric by suction effect towards the fabric-facing surface , characterised in that the first part of the fabric-facing surface is followed by a second part of the fabric-facing surface which second part of the fabric-facing surface is a surface formed as an end surface of a final solid element and which end surface of the final solid element does not lie in the same plane as planar surfaces of the solid elements belonging to the first part of the fabric-facing surface but is spaced from the plane in which the planar surfaces of the solid elements belonging to the first part of the fabric-facing surface lie such that, when the permeable fabric passes over the suction device and moves past the final solid element along the plane of the planar surfaces of the solid elements belonging to the first part of the fabric-facing surface , the permeable fabric will not contact the final solid element , the final solid element being separated from a preceding solid element such that a final channel is defined between the final solid element and the preceding solid element and the final channel being capable of communicating with at least one source of underpressure for the final channel when the at least one source of underpressure for the final channel is connected to the suction device such that an underpressure can be generated in the area between the permeable fabric and the surface of the final solid element . <EOS>