Abstract: In a sliding gate (1) mounted on wheels sliding on a straight rail a movement system is provided that comprises a straight rack (2) integral with the gate (1), engaging means (5,105) for engaging the rack (2) to produce the horizontal movement of the gate, and activating means (9) for moving the engaging means (5,105), said engaging means (5,105) comprising a wheel (11,111) having an axis substantially parallel to the horizontal direction of the translation of the gate and having engaging elements (8,108), arranged on its lateral circumferential outer surface, to engage with said rack (2).