Adjustable pressure wringer for floor mops comprising: - a pressure surface with rectilinear translation; - a handle at the end of which is a grip; - a quadrangular frame open at least on the top side for the entry of the cloth to be wrung, and that comprises: - two side walls (5, 6) on two sides opposite and contiguous to the top one; - a support wall that counteracts the pressure squeezing the cloth and that connects the two said side walls (5, 6); - two seats (8, 9) obtained on said two side walls (5, 6) for the hinging and/or rotation of a rotating shaft; - a rotating shaft, within said frame and hinged/rotating within said seats (8, 9), and that is fixed to said handle on the opposite side to the grip; - one or more arms joined solidly with said rotating shaft and having a free end; - one or more connecting rods having a first and a second hinging end; where said connecting rods are hinged with their own first end to the free end of said one or more arms; - a pressure surface that moves with a translational movement within said frame and that has a first and a second larger side, hinged to the second end of said one or more connecting rods in an intermediate position of its first larger side, where said second larger side, opposite to the first, is the surface that presses the cloth against said supporting wall; characterised by the fact that said seats (8, 9) are connected to rotating pawls that create the rotation seat of the shaft in at least two positions corresponding to the rotation angle and moving the shaft-arm-connecting rod-pressure surface assembly towards the support surface and in a second position moving the shaft-arm-connecting rod-pressure surface assembly away from the support surface achieving a minimum variable distance between the pressure surface and the support surface corresponding to an adjustment of the degree of maximum pressure for wringing a mop, which can be obtained with the alignment of the kinematic chain between the arm-connecting rod. - a pressure surface with rectilinear translation; - a handle at the end of which is a grip; - a quadrangular frame open at least on the top side for the entry of the cloth to be wrung, and that comprises: - two side walls (5, 6) on two sides opposite and contiguous to the top one; - a support wall that counteracts the pressure squeezing the cloth and that connects the two said side walls (5, 6); - two seats (8, 9) obtained on said two side walls (5, 6) for the hinging and/or rotation of a rotating shaft; - a rotating shaft, within said frame and hinged/rotating within said seats (8, 9), and that is fixed to said handle on the opposite side to the grip; - one or more arms joined solidly with said rotating shaft and having a free end; - one or more connecting rods having a first and a second hinging end; where said connecting rods are hinged with their own first end to the free end of said one or more arms; - a pressure surface that moves with a translational movement within said frame and that has a first and a second larger side, hinged to the second end of said one or more connecting rods in an intermediate position of its first larger side, where said second larger side, opposite to the first, is the surface that presses the cloth against said supporting wall;