Vineyard supporting intermediate pole (22), arranged between the two head poles (10) between which is stretched the plant carrying wire (16), said intermediate pole consisting of a metal section whose lower end is driven into the ground. The top end of the intermediate pole has a sliding surface for supporting the plant, the sliding surface being formed by a curved part of the metal section, which is furrowed by a groove (32) within which the carrying wire (16) is held.
