An anchoring device for fastening guide wires on a roof has a base. The base has a mounting surface, a support, and carriers to which the wire guides are attached. The carriers are rotatably connected to the support and can be fixed in any desired relative position to the support, so that the anchoring device has many possibilities for holding the guide wires. The support has a number of parts which are present between the carriers, whereby between two adjacent parts of one or more carriers can be clamped. The wire guides are at different distances d1 and d2 from the central axis of the support and are at distances D1, D2 and D3 from each other.