PURPOSE: To improve safety by respectively fastening/installing a netlike wall to/on an upper platform and a lower platform by using a clamp device.

CONSTITUTION: This scaffolding net system is composed of a scaffolding device 10, an upper platform 40, a lower platform 42, a netlike wall 60 and a clamp device 120. The netlike wall 60 is stretched between the upper platform 40 and the lower platform 42 of the scaffolding device 10. Next, the upper folding- back edge 64 and the lower folding-back edge 66 of the netlike wall 60 are respectively fastened to and installed on the upper platform 40 and the lower platform 42 by the clamp device 120 to thereby protect a scaffold.