A device for holding an insulating blanket and for fastening systems for an aircraft including aircraft frames, a skin, and connecting pieces between the skin and the frames, the connecting pieces including clips, includes two brackets and a member that contours at least a portion of one of the aircraft frames. Each bracket has a first branch configured to be fastened to one of the clips and a second branch provided with a slot. The member that contours at least a portion of one of the aircraft frames includes a base and two arms. Each arm has a free end forming a securing lug configured to be inserted into the slot of one of the brackets with a flange which forms a stop countering displacement of the securing lug once the latter is inserted into the slot. Each arm further includes at least one support configured to accommodate a system.