Abstract: A pool skimmer having an elongated, floating barrier constructed of a plurality of rigid, elongated floats disposed in end-to-end relation and covered by flexible netting, one end of the barrier having a member for anchoring the one end in engagement with the wall of a swimming pool and the other end of the barrier having manually graspable members for engaging the other end with the wall and for traversing the other end around the wall so that the barrier sweeps the pool surface and collects floating material, such as oil. The barrier has a pleated configuration for expansion and contraction to accommodate varying distances between its ends as the barrier sweeps the pool so as to circumscribe the material and, finally, to assume a fully contracted configuration. The skimmer includes a case which is upwardly open and is downwardly perforated, the case being submerged beneath the barrier and then raised to receive the barrier and lift it and the collected material from the pool.