Support pole (10) with an oblong development, for external applications, to make fences or for agricultural or gardening applications to support any type of plant, consisting of a bent metal sheet with a substantially polygonal cross section, defined by a plurality of walls (13, 14) angled with respect to each other and connected by connection portions (15). The support pole is supplied at least in one part of longitudinal development of at least one of the connection portions (15) between the walls (13, 14), with stiffening ribs (16) with a development transverse to the oblong development of the support pole (10), to give it greater resistance to torsion and flexion.
