Abstract: The invention relates to a sectional door of a vehicle opening as close as possible to the body of said vehicle, having cam strikers for closing, locking and opening same, having actuators for opening same and having a movable window capable of separating from said body and translating horizontally along said door. These elements are implemented on a door having surfaces with a complex geometry, thus providing a one-piece body having surfaces with a complex geometry, with a single large opening on the side for accessing the front seats and the rear seats, and a single large door for closing said opening.