To provide a prevention fence against fall capable of preventing the dirt from being accumulated on the top of a wall handrail, and, preventing an external wall surface of the wall handrail from being stained with the flowing dirt adhered to the fence resulting from rain water, having no oppressive feeling in terms of scenery when it is looked up from street, house or the like located downward thereof in a viaduct, overbridge or the like having the prevention fence for falling dirt, viewed from the ground.

The top 11 of the wall handrail 1 is inclined inward of the road, and, a strut 1 is fixed at right angles to the top 11 of the wall handrail 1, the strut 1 is slantly erected inward of the road to the vertical line by an angle equivalent to an angle of inclination of the top 11 of the wall handrail 1, accordingly, a fence body 3 is also inclined inward of the road to the vertical line by an angle equivalent to the angle of inclination of the top 11 of the wall handrail 1 to make flush the external wall surface of the wall handrail 1 with the outside of the fence body 3.