The invention relates to a device for holding an insulating blanket and for fastening systems in an aircraft, comprising a base having two ends from each of which an arm extends.At least one arm has a U-shaped part having two more or less parallel branches, and in that the said device further comprises at least one support for accommodating a system.The invention also relates to an aircraft fuselage section comprising frames, an outer skin, stabilizers and at least one insulating blanket. This section comprises at least one holding device such as described above, mounted so that a frame is situated between the arms of the holding device so that the blanket is between the frame and the holding device.