An assembly rail has at least one profile element with support legs. A rail slot is defined between the support legs and extends in a longitudinal direction of the at least one profile element. The support legs are oriented inwardly toward an interior of the at least one profile element. A hollow profile that is larger than the at least one profile element has edge strips arranged along at least one longitudinal side of the hollow profile. Between the edge strips a receiving slot is formed. The at least one profile element is arranged in the receiving slot and is connected fixedly to the hollow profile. The rail slot of the at least one profile element opens outwardly.