PURPOSE: A drainage rainwater inlet of a road side gutter is provided to prevent the obstruction to the traffic and to prevent the various accidents and the submersion of the surrounding buildings caused by rainwater. CONSTITUTION: The drainage rainwater inlet of a road side gutter is completed by installing a catchment area(6) to make the water flow in a collecting well smoothly when the rainwater collected in a footway(14), a bicycle road(12), a road boundary stone(10), a road surface, etc. flows in through a rainwater inlet cover(2), wherein the catchment area(6) is inclined toward from a road side gutter(24) toward a collecting well to make drainage smooth.
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