NOVELTY - The device (1) has a boom (3) and a gaff (4) including respective front ends (31, 41) secured to a mast (2). A longitudinal guiding element (5) i.e. cable, connects rear ends (32, 42) of the boom and the gaff, respectively, such that the element is extended parallely to the mast. A rectangular sail (6) has a longitudinal guide rail and a guiding carriage that guide along the mast and the element, respectively. Mechanized units i.e. halliards (7, 8), hoist and lower the sail, while maintaining a hoist (62) and a leech (63) that are guided along the mast and the element, respectively.    USE - Mechanized device for rigging a rectangular sail of a ship e.g. load or passenger transport ship (all claimed).    ADVANTAGE - The halliards hoist and lower the sail having large size and heavy weight, in a mechanized and automated manner. The configuration of the device permits controlling of the sail in case of gust of wind, thus preventing the unfolding of the sail in an ill-timed manner, and preventing the damage of the sail and ship, and hence providing safety for crew found around the sail, while permitting the device to be frequently used under strong wind conditions. The configuration of the device guarantees minimum maintenance on the sail and improves the longevity of the sail. The halliards maintain the hoist and the leech of the sail when the sail is lowered, thus permitting the sail to be furled automatically above the boom, and hence storing the sail in a safe manner and carrying out propelling and hauling down of the sail in a rapid, mechanized and safe manner. The configuration of the device permits controlling of the sail during hoisting or lowering operations, without risk of visualizing a part of the sail or totality of the sail in a position where the sail is not stored safely, while considering the size and weight of the sail.    DETAILED DESCRIPTION - The rectangular sail is made of fabric, composite material or metal.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic side view of a mechanized device for rigging a sail.    Mechanized rigging device (1)    Mast (2)    Boom (3)    Gaff (4)    Longitudinal guiding element (5)    Rectangular sail (6)    Halliards (7, 8)    Front end of boom (31)    Rear end of boom (32)    Front end of gaff (41)    Rear end of gaff (42)    Lower edge (61)    Hoist (62)    Leech (63)