Sliding base for a vacuum cleaner nozzle, comprising - a suction mouth which is formed on the underside of the sliding base and is delimited by a front and a rear suction mouth edge (2, 3), - a slide-on slope upstream of the suction mouth in the working direction, - an inclined sliding surface downstream of the suction mouth in the working direction and - a suction mouth opening opening into the suction mouth, the front suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, the rear suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, and a horizontal plateau being arranged between the inclined sliding surface and the rear suction mouth edge, which plateau extends, at the level of the rear suction mouth edge, over the entire width of the rear suction mouth edge in parallel therewith and has a length of at least 8.5 mm, the length and the width of the rear suction mouth edge being perpendicular or substantially perpendicular to one another and the width of the rear suction mouth edge extending in parallel with the working width, characterised in that a height of the horizontal plateau is 0.5 to 1.5 mm higher than the height of the front suction mouth edge, with respect to an operational working position of the sliding base. - a suction mouth which is formed on the underside of the sliding base and is delimited by a front and a rear suction mouth edge (2, 3), - a slide-on slope upstream of the suction mouth in the working direction, - an inclined sliding surface downstream of the suction mouth in the working direction and - a suction mouth opening opening into the suction mouth, the front suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, the rear suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, and a horizontal plateau being arranged between the inclined sliding surface and the rear suction mouth edge, which plateau extends, at the level of the rear suction mouth edge, over the entire width of the rear suction mouth edge in parallel therewith and has a length of at least 8.5 mm, the length and the width of the rear suction mouth edge being perpendicular or substantially perpendicular to one another and the width of the rear suction mouth edge extending in parallel with the working width, characterised in that a height of the horizontal plateau is 0.5 to 1.5 mm higher than the height of the front suction mouth edge, with respect to an operational working position of the sliding base. the front suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, the rear suction mouth edge extending without interruption over the entire working width of the sliding base and, at both ends of the suction mouth, delimiting an end portion of the suction mouth designed for edge suction, and a horizontal plateau being arranged between the inclined sliding surface and the rear suction mouth edge, which plateau extends, at the level of the rear suction mouth edge, over the entire width of the rear suction mouth edge in parallel therewith and has a length of at least 8.5 mm, the length and the width of the rear suction mouth edge being perpendicular or substantially perpendicular to one another and the width of the rear suction mouth edge extending in parallel with the working width, characterised in that a height of the horizontal plateau is 0.5 to 1.5 mm higher than the height of the front suction mouth edge, with respect to an operational working position of the sliding base.