An assembly for retaining a lining element to a body element of a vehicle during the deployment of an airbag interposed between the lining and the body elements, the assembly including: - a clip-holder intended to be connected to the lining element, comprising at least one wall provided with a snap-fit orifice; - a retaining device mounted on the clip-holder, comprising: a clip presenting a head shaped to snap-fit on the body element of the vehicle, and a base shaped to snap-fit in the snap-fit orifice of the clip-holder; the device being displaceable between a rest position, in which the base of the clip is snap-fitted on the snap-fit orifice of the clip-holder, and a retaining position in which the base of the clip is disengaged from the snap-fit orifice and the anchor member bears against the circumference of the snap-fit orifice so as to retain the lining element to the body element by means of the clip-holder and the cord; characterized in that a flexible textile cord of the retaining device connects the clip to an anchor member; the anchor member being shaped so that: - when oriented in a first direction, it can be introduced through the snap-fit orifice of the clip-holder, so as to enable mounting of the device in the rest position; and - when oriented in a second direction, it cannot pass through the snap-fit orifice of the clip-holder, so that the anchor member bears against the circumference of the snap-fit orifice and retains the lining element to the body element by means of the clip-holder; the clip-holder comprising fastening means adapted to fasten the anchor member without any degree of freedom when the retaining device is in the rest position, and to enable release of the anchor member when the device switches from its rest position to its retaining position. - a clip-holder intended to be connected to the lining element, comprising at least one wall provided with a snap-fit orifice; - a retaining device mounted on the clip-holder, comprising: a clip presenting a head shaped to snap-fit on the body element of the vehicle, and a base shaped to snap-fit in the snap-fit orifice of the clip-holder; the device being displaceable between a rest position, in which the base of the clip is snap-fitted on the snap-fit orifice of the clip-holder, and a retaining position in which the base of the clip is disengaged from the snap-fit orifice and the anchor member bears against the circumference of the snap-fit orifice so as to retain the lining element to the body element by means of the clip-holder and the cord; characterized in that a flexible textile cord of the retaining device connects the clip to an anchor member; the anchor member being shaped so that: - when oriented in a first direction, it can be introduced through the snap-fit orifice of the clip-holder, so as to enable mounting of the device in the rest position; and - when oriented in a second direction, it cannot pass through the snap-fit orifice of the clip-holder, so that the anchor member bears against the circumference of the snap-fit orifice and retains the lining element to the body element by means of the clip-holder; the clip-holder comprising fastening means adapted to fasten the anchor member without any degree of freedom when the retaining device is in the rest position, and to enable release of the anchor member when the device switches from its rest position to its retaining position. a clip presenting a head shaped to snap-fit on the body element of the vehicle, and a base shaped to snap-fit in the snap-fit orifice of the clip-holder; the device being displaceable between a rest position, in which the base of the clip is snap-fitted on the snap-fit orifice of the clip-holder, and a retaining position in which the base of the clip is disengaged from the snap-fit orifice and the anchor member bears against the circumference of the snap-fit orifice so as to retain the lining element to the body element by means of the clip-holder and the cord; characterized in that a flexible textile cord of the retaining device connects the clip to an anchor member; the anchor member being shaped so that: - when oriented in a first direction, it can be introduced through the snap-fit orifice of the clip-holder, so as to enable mounting of the device in the rest position; and - when oriented in a second direction, it cannot pass through the snap-fit orifice of the clip-holder, so that the anchor member bears against the circumference of the snap-fit orifice and retains the lining element to the body element by means of the clip-holder; the clip-holder comprising fastening means adapted to fasten the anchor member without any degree of freedom when the retaining device is in the rest position, and to enable release of the anchor member when the device switches from its rest position to its retaining position. - when oriented in a first direction, it can be introduced through the snap-fit orifice of the clip-holder, so as to enable mounting of the device in the rest position; and - when oriented in a second direction, it cannot pass through the snap-fit orifice of the clip-holder, so that the anchor member bears against the circumference of the snap-fit orifice and retains the lining element to the body element by means of the clip-holder; the clip-holder comprising fastening means adapted to fasten the anchor member without any degree of freedom when the retaining device is in the rest position, and to enable release of the anchor member when the device switches from its rest position to its retaining position.