A nozzle for a cleaner may comprise a nozzle housing and a rotation cleaning unit rotatably disposed under the nozzle housing. The rotation cleaning unit may comprise a mop configured to clean a floor and a rotation plate coupled to the mop. The nozzle may comprise a driving device disposed in the nozzle housing and comprising a motor configured to drive the rotation cleaning unit, and a water tank mounted on the nozzle housing and configured to store water. The mop may comprise a floor cleaning portion, an attaching portion disposed above the floor cleaning portion to be coupled to the rotation plate, and an upper absorbing portion disposed above the floor cleaning portion and at least partially overlapping the attaching portion. The upper absorbing portion may be sewn to the attaching portion and may be configured to absorb water from the water tank.