Abstract: A reel for supporting optical fibres includes a winding drum having a tubular cylindrical shape, a pair of containing flanges, each of which is positioned close to one end edge of the winding drum, a central core positioned coaxially inside the winding drum, and at least one pair of interconnecting flanges positioned either side of a transverse median plane of the reel, each of which extends from the central core to the winding drum. The interconnecting flanges are at least partly frustoconical in shape and are joined directly to the winding drum with their frustoconical part at attachment points, and to the central core at anchor points. The anchor points are positioned closer to the transverse median plane of the reel than are the attachment points so as to form an angle between the interconnecting flanges and the central core of amplitude such as to limit deformation of the pair of containing flanges during rotation of the reel.