To provide a safety fence easily installable and having high visibility and safety.

This safety fence comprises a plurality of support posts 2 and a plurality of partition panels 3. Each support post 2 is formed of a plastic, has a pair of grooved accepting parts 4 closed at the bottom end, opened at the top end, and extending in the vertical direction at the symmetric positions, and is fixed with anchor bolts 20 and disposed on the ground. Each partition panel is formed of a first panel 31, a second panel 32, and a third panel 33 each of which is formed of a plastic, which presents a plate shape narrower than the accepting part 4 and has the generally same thickness as the accepting part, which is vertically stacked while facing the end surfaces each other, which has mutually fitted projecting part and recessed part formed in the upper surface and the lower surface, respectively, is disposed by inserting the side end part into the accepting part of the support post 2, is vertically installed while being supported by the support post 2, and interrupts the line of sight.