Abstract: An automatic roller wringer for mops and the like, consisting of the incorporation of the main gears inside the casing, one of the gears being provided with a projection for the stop, the main gears being asymmetrically assembled on either side, engaging with the fixed roller, each one of the main gears being provided with an eccentric guide on the inner part through which the pivots of the movable roller pass until the latter is in a position adjacent to the fixed roller, which upwardly rotates, the arms supporting the pivots of the arm of the movable roller being provided with a spring on each one.