(EN) This invention relates to an anchorage device for use in anchoring a member to a structure, the device comprising at least two elongate rigid elements (12, 14) for independent insertion into respective divergent recesses (32, 34) formed in the structure, and holding (18) means for detachably holding the said elements at a position externally of the recesses whereby the rigid elements (12, 14) are anchored in their respective recesses (32, 34) in a divergent state. The anchorage device of the invention may be used in particular for anchoring scaffolding to a building.