Mop bucket with two compartments positioned horizontally, one for containing clean water and the other for containing dirty water, where each compartment is connected to its corresponding wringer. It comprises three pieces that can be coupled together: a first and main piece that comprises the clean water container, on whose mouth a second piece is coupled, comprising a compartment for dirty water, which is smaller in size and has a lower height, in such a way that after it has been fitted, its bottom is higher than the bottom of the main body, with two mouths for the whole bucket. Said whole is then finished off at the top with a third piece that can be coupled to it and which contains a pair of wringers that coincide with the mouths of each water compartment, together with an opening for the mop head to gain access to the clean water compartment.