The invention relates to a mop (1) comprising a mop-head plate (2) for a mop cover (3). The mop-head plate (2) comprises a first connector (4), which can be connected to at least one second connector (5) of a wringer device (6) in order to wring out the mop cover (3). The invention also relates to a wringer device (6) for a mop (1) comprising a mop-head plate (2) for a mop cover (3), said plate having two folding mop-head plate parts (7, 8). Said wringer device (6) comprises a funnel-shaped wringer compartment (22). The mop cover (3) can be introduced into said compartment from above and compressed by actuating the wringer device, when the mop-head plate parts (7, 8) are in an essentially vertical position and said cover is partially detached and suspended from said parts. The opposing transversal surfaces (10, 11) of the mop-head plate parts (7, 8) form compression surfaces. The wringer device (6) comprises a lever unit (23) with the second connector (5), said lever unit consisting of an actuating lever (24) and a pressure lever (25) that is connected to the actuating lever (24). The pressure lever (25) forms the second connector (5) and can be connected to the first connector (4).