A nozzle intended to be connected to a suction source, such as a vacuum cleaner/wet vacuum cleaner, whereby the nozzle includes at least one suction aperture which communicates with the suction source, and a gathering unit disposed close to each suction aperture, each gathering unit including a surface treatment element. Distinguishing features of the nozzle are that each gathering unit has a peripheral surface and a front surface which faces towards the running surface, the transition between the peripheral surface and the front surface is rounded, each gathering unit is provided with a scraper unit which is U-shaped in cross-section and constitutes a surface treatment element, and that the open side of the scraper unit is oriented along the front surface of the gathering unit.