The invention relates to a drive system for a door leaf, in particular a sectional door leaf, consisting of individual, is pivotally interconnected gate leaf elements which, in substantially vertical guide-rail sections by a guide arc, with substantially horizontal guide-rail sections are connected, can be moved, wherein above and parallel to the substantially horizontal guide-rail sections guide rails are arranged, wherein in at least one guide rail is a continuous, circulating force transmission means, which is arranged at one end by a drive device, which is connected with the guide rail is driven, and in that the force transmission means with a in the guide rail variably placed connection element is connected to the upper door leaf element is fastened, and above the substantially horizontal guide rail sections on one side of the door leaf, the guide rail and on the opposite side a combination of rail is arranged, wherein the combination of a guide rail for a guide roller and a drive region for the force transmission means, wherein the guide region and the drive region via an axle with the upper door leaf element are in operative connection.n="18"
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