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.