PROBLEM TO BE SOLVED: To provide a passage preventing implement for snow particles or raindrops, by which the snow particles or raindrops do not pass and are captured on one surface side in avoiding damage by reducing the influence of an air moving pressure (wind pressure), and slip down along an inclined surface, and by which snow or rain is not accumulated on a side where a protection object exists.SOLUTION: An inventive passage preventing implement for snow particles or raindrops includes: openings which penetrate through the implement from the surface to the back, allow air to pass but falling snow particles or raindrops not to pass therethrough in order to capture the snow particles or raindrops and have a size smaller than the snow particles or raindrops and a material part which surrounds the openings, makes the snow particles or raindrops slip and fall, and constitutes the passage preventing implement.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明の課題は、空気の移動圧(風圧)による影響を低減することで破壊を回避する中で、雪粒又は雨粒が通過することなく一面側に捕獲され、傾斜した面に沿って滑落し、保護対象のある側には、雪や雨が集積しない雪粒・雨粒の通過阻止具を提供することである。【解決手段】本発明の雪粒・雨粒の通過阻止具は、空気を通過させるが、降ってくる雪粒・雨粒を通さないで捕獲するために、雪粒・雨粒より小さい表裏を貫通する開口部とそれを取り巻き、雪粒・雨粒を滑落させ、阻止具を構成する素材部を有している。【選択図】図1