Abstract: A gutter system for mounting under a structure's roof edge, which collects water run off in preference to leaves and debris, includes a shield, back support wall, and trough, integrally connected. The shield comprises a continuous double-curved convlute curve, generated on a first and a second radius, which extends from the back wall, down short of the inside of the front wall of the trough, and inward over the trough. The system is fastened to the structure by fastening means attached to the shield front, which pass generally horizontally under the shield and through the back support wall. In a preferred embodiment, the first radius has its origin generally where the trough bottom joins the back support wall, and the second radius has its origin generally at the fastening means, with their curves joining at a location where each is tangent to a common line.