The invention provides an anchoring device for anchoring an elongate guide element (4) of an architectural covering. The anchoring device includes a body (12) having a rear surfaces (24). The body (12) is suitable for attachment to a support structure with the rear surface (24) in close contact with the support structure. The body (12) includes a receiving cavity (32) for receiving the elongate guide element (4), a first entrance (28) to the receiving cavity (32) and a second entrance (30) to the receiving cavity (32). The receiving cavity (32) can receive the elongate guide element (4) selectively either through the first entrance (28), with the rear surface (24) having a first orientation with respect to the elongate guide element (4), or through the second entrance (30), with the rear surface (24) having a second orientation with respect to the elongate guide element (4), and wherein the second orientation is substantially different from the first orientation.