Main tilting door for the closure of an access opening of a room, particularly of a garage space, comprising: - at least two fixed uprights and one fixed crosspiece associable with each other to define a fixed frame which can be fixed to an access opening of a room, wherein said fixed uprights comprise vertical sliding guides ; - at least two movable uprights and two movable crosspieces associable with each other to define a substantially rectangular movable frame ; - tilting movement means of said movable frame comprising: - at least two lateral supporting arms each having a first end which can be hinged to an intermediate area of said movable uprights and a second end which can be hinged to a top of said fixed uprights ; - at least two sliding supports associable with said movable uprights and movable along said vertical sliding guides ; - a plurality of panels associable with said movable frame ; characterized by the fact that at least one of said movable uprights and said movable crosspieces comprises at least one sliding track and a plurality of cursors movable along said sliding track , said panels being associable with said cursors , wherein said sliding track comprises at least one profiled element defining a longitudinal cavity , adapted to house said cursors , and provided with two longitudinal folds spaced apart from each other to define a longitudinal fissure and wherein said cursors comprise at least one protruding portion defined on one side of said cursor , adapted to guide the sliding of said cursors along said longitudinal fissure . - at least two fixed uprights and one fixed crosspiece associable with each other to define a fixed frame which can be fixed to an access opening of a room, wherein said fixed uprights comprise vertical sliding guides ; - at least two movable uprights and two movable crosspieces associable with each other to define a substantially rectangular movable frame ; - tilting movement means of said movable frame comprising: - at least two lateral supporting arms each having a first end which can be hinged to an intermediate area of said movable uprights and a second end which can be hinged to a top of said fixed uprights ; - at least two sliding supports associable with said movable uprights and movable along said vertical sliding guides ; - at least two lateral supporting arms each having a first end which can be hinged to an intermediate area of said movable uprights and a second end which can be hinged to a top of said fixed uprights ; - at least two sliding supports associable with said movable uprights and movable along said vertical sliding guides ; - a plurality of panels associable with said movable frame ; characterized by the fact that at least one of said movable uprights and said movable crosspieces comprises at least one sliding track and a plurality of cursors movable along said sliding track , said panels being associable with said cursors , wherein said sliding track comprises at least one profiled element defining a longitudinal cavity , adapted to house said cursors , and provided with two longitudinal folds spaced apart from each other to define a longitudinal fissure and wherein said cursors comprise at least one protruding portion defined on one side of said cursor , adapted to guide the sliding of said cursors along said longitudinal fissure . <EOS>