Anchoring device for anchoring a cable with a predetermined diameter to a support, comprising a lockout element for locking out the cable and a connection element for connecting the lockout element to the support, wherein: - the lockout element has a groove for housing the cable, radially oriented and leading to the periphery of the lockout element, said groove is located around a hub and between a first side panel and a second side panel each one extending from the hub, said groove is delimited by a bottom surface forming part of the hub, by a first lateral surface forming part of the first side panel and extending between the bottom surface and the periphery of the lockout element and by a second lateral surface forming part of the second side panel and extending between the bottom surface and the periphery of the lockout element, the first lateral surface and the second lateral surface being opposite each other and at a distance from each other; characterised in that said groove is annular and comprises a hold sector and a transition sector: throughout the hold sector the groove has a width, that is to say the distance between the first lateral surface and the second lateral surface, which corresponds to said predetermined diameter of the cable, and throughout the hold sector the groove has a depth, that is to say the distance between the bottom surface and the periphery of the lockout element, which is at least equal to two times the abovementioned predetermined diameter of the cable, so that two portions (38, 39) of said cable arranged in the hold sector are superimposed; and in said transition sector the first side panel is interrupted so that it allows said cable to transit with an axial shift between a location where it is outside the first side panel and a location where it is inside the groove against the bottom surface; and - the lockout element and the connection element are configured so that the lockout element houses said cable with, successively, between a loose side and a tight side, a first portion which passes through the transition sector and joins the hold sector, then a second portion doing a full turn around the hub while being against the bottom surface in the hold sector, then in the hold sector a third portion covering the second portion, then a fourth portion leaving the lockout element, thanks to which a traction applied on the fourth portion in the direction that stresses the cable on moving away from the lockout element, makes the third portion press against the bottom surface the segment of the second portion overlaid by the third portion. - the lockout element has a groove for housing the cable, radially oriented and leading to the periphery of the lockout element, said groove is located around a hub and between a first side panel and a second side panel each one extending from the hub, said groove is delimited by a bottom surface forming part of the hub, by a first lateral surface forming part of the first side panel and extending between the bottom surface and the periphery of the lockout element and by a second lateral surface forming part of the second side panel and extending between the bottom surface and the periphery of the lockout element, the first lateral surface and the second lateral surface being opposite each other and at a distance from each other; characterised in that said groove is annular and comprises a hold sector and a transition sector: throughout the hold sector the groove has a width, that is to say the distance between the first lateral surface and the second lateral surface, which corresponds to said predetermined diameter of the cable, and throughout the hold sector the groove has a depth, that is to say the distance between the bottom surface and the periphery of the lockout element, which is at least equal to two times the abovementioned predetermined diameter of the cable, so that two portions (38, 39) of said cable arranged in the hold sector are superimposed; and in said transition sector the first side panel is interrupted so that it allows said cable to transit with an axial shift between a location where it is outside the first side panel and a location where it is inside the groove against the bottom surface; and - the lockout element and the connection element are configured so that the lockout element houses said cable with, successively, between a loose side and a tight side, a first portion which passes through the transition sector and joins the hold sector, then a second portion doing a full turn around the hub while being against the bottom surface in the hold sector, then in the hold sector a third portion covering the second portion, then a fourth portion leaving the lockout element, thanks to which a traction applied on the fourth portion in the direction that stresses the cable on moving away from the lockout element, makes the third portion press against the bottom surface the segment of the second portion overlaid by the third portion.