The pool skimmer screen is a device for preventing debris, bees, and other small insects and animals from being lodged in the pool skimmer. The skimmer screen, removably mounted to the swimming pool wall in front of the pool skimmer mouth, includes a substantially rigid support frame having a screen fitted taut therein. The skimmer screen includes a plurality of magnets mounted on the rear of the frame whereby the skimmer screen may be magnetically attached to the metallic surface of an above-ground swimming pool. The skimmer screen may be adapted for attachment to a swimming pool having plaster, tile or other non-metallic surface by the use of metallic pads mounted to the wall of the swimming pool and positioned to adhere to the magnets of the skimmer screen.