Abstract: It is an object of the invention to provide a floating fence, which offers as feeble flow resistance as possible and by means of which the impurities, which shall be collected, are in an efficient manner guided into the same with the smallest possible spillage. The floating fence designed according to the invention comprises an impermeable wall intersecting the water surface and a net section, the upper longitudinal portion of which is on the lee side attached to the impermeable wall near to the water surface, its other longitudinal edge portion being carried at a level below and at a distance from the lower longitudinal edge portion of the impermeable wall. The impermeable wall is carried by float bodies and is at its bottom edge portion of the net section and the upper portion of the impermeable wall in the longitudinal direction of the fence traversed by towing or anchoring cables.