To provide a protective member for a guard fence which can sufficiently improve the safety of the guard fence despite the fact that the manufacturing cost is low and cannot be easily removed from the guard fence.

This protective member for a guard fence installed along the edge of the tabular guard fence comprises a protective part formed in a curved or bent shape in cross section and an opening part having side walls continuously extending from the protective part and opposed to each other. In particular, at least one position of the opening part is squeezed so that the side walls of the opening part opposed to each other can elastically hold the edge of the guard fence.