A filter for use with a rain gutter will prevent solid debris, such as leaves, from entering the gutter, but will not unduly restrict passage of rain water into and through the gutter. The filter comprises a liquid permeable strip that can be formed of a material, such as reticulated polyurethane foam. This strip is supported at the top of the gutter by a support member, which can be a thermoformed member, affixed to the underside of the strip. Legs, which can fold transversely to the strip will support the strip above the bottom of the gutter. When the legs are in a flat configuration, multiple filter members can be stacked for storage and shipping. Installation is essentially toolless and the filters can be cut to length.