Abstract: A washing-up sink includes first, second, third, and fourth side plates which are arranged in a substantially rectangular structure, and a first bottom plate mounted to a lower edge of the rectangular structure thereby defining a first compartment therebetween. The first side plate has an extension, and this extension and the fourth side plate have a second bottom plate mounted therebetween lower edges thereof. The second bottom plate has a length less than that of the extension and a width less than that of the fourth side plate. The second bottom plate has an inclined washplate projecting from outer edge thereof and extending upward and outward between the extension of the first side plate and the fourth side plate thereby defining a second compartment therebetween.