An apparatus for removing water contaminants, in which when water contaminants, such as oil, green algae and red algae, are generated on the water surface, the apparatus sucks in the water contaminants, passes the sucked in water contaminants through an absorbent paper in order that the water contaminants are absorbed by the absorbent paper, and makes the absorbent paper roll periodically or continuously, thereby maintaining the absorbability of the absorbent paper contaminated by the water contaminants. The apparatus includes a suction pipe for sucking in the water contaminants from an inlet; a suction pump connected to the suction pipe for sucking in the water contaminants from the inlet to the outlet side of the suction pipe; and an absorbent paper installed at the periphery of the inlet of the suction pipe, wherein the absorbent paper is installed to be movable in the inlet and absorb the water contaminants.