Abstract: A roof anchor including a pair of blocks positioned side-by-side. The blocks have adjacent, inner surfaces with notches cut therefrom for receiving a standing seam of a metal roof. The blocks also have outer surfaces remote from the inner surfaces. A bracket is positioned over the pair of blocks. The bracket includes a base portion having a pair of legs, each being positioned adjacent a respective one of the outer surfaces of the blocks, and a crosspiece, positioned adjacent the tops of the blocks, joining the legs together. A loop portion is affixed to the base portion for securement of a workman's safety lanyard. A threaded fastener penetrates the pair of blocks and the pair of legs for: fastening the pair of blocks together, securing the bracket to the pair of blocks, and clamping the pair of blocks upon a standing seam of a metal roof.