To provide a falling rock safety net anchor capable of being driven without having much strength and increasing proof stress to earth pressure from the side with a simple constitution.

The falling rock safety net anchor 1 is so constituted that a resistance board 3 receiving earth pressure from the side is fixed to the back section of a pile 2 driven into the ground from the front end, and in the falling rock safety net anchor 1 providing a fixed section 4 of a wire rope to the rear end section of the pile 2, the pile 2 is formed of a shape-steel, each connecting surface between the rear side of the pile 2 and the resistance board 3 is formed tabular, and even if the pile 2 is driven by using a small-sized driving machine, a moving amount in front of the falling rock safety net anchor 1 does not become small, and earth pressure transferred to the resistance board 3 from the ground is evenly transferred to the connecting surface.