A slide rail assembly , applicable to a rack for a server cabinet, the slide rail assembly comprising: a rail element connected to a first bracket which is configured to be mounted to the rack of the server cabinet, said rail element having a first wall , a second wall and an extension wall connected between the first wall and the second wall ; a main supporting element fixedly connected to a backside of the extension wall of the rail element , the main supporting element having a pair of supporting walls and a longitudinal wall connected between the pair of supporting walls , a main passage being defined by the pair of supporting walls and the longitudinal wall ; a first supporting element having at least one portion arranged in the main passage of the main supporting element , the first supporting element having a pair of first supporting walls and a first longitudinal wall connected between the pair of first supporting walls , a supporting passage being defined by the pair of first supporting walls and the first longitudinal wall ; a second supporting element having at least one portion arranged in the supporting passage of the first supporting element , the second supporting element having a pair of second supporting walls and a second longitudinal wall connected between the pair of second supporting walls ; characterized by : a supporting base fixedly connected to the first supporting element , the supporting base comprising at least one supporting feature directly holding one of the first wall and the second wall of the rail element , the supporting base configured to move with the first supporting element to support the rail element ; and a second bracket mounted to the second supporting element , and configured to be mounted to the rack for the server cabinet. a rail element connected to a first bracket which is configured to be mounted to the rack of the server cabinet, said rail element having a first wall , a second wall and an extension wall connected between the first wall and the second wall ; a main supporting element fixedly connected to a backside of the extension wall of the rail element , the main supporting element having a pair of supporting walls and a longitudinal wall connected between the pair of supporting walls , a main passage being defined by the pair of supporting walls and the longitudinal wall ; a first supporting element having at least one portion arranged in the main passage of the main supporting element , the first supporting element having a pair of first supporting walls and a first longitudinal wall connected between the pair of first supporting walls , a supporting passage being defined by the pair of first supporting walls and the first longitudinal wall ; a second supporting element having at least one portion arranged in the supporting passage of the first supporting element , the second supporting element having a pair of second supporting walls and a second longitudinal wall connected between the pair of second supporting walls ; characterized by : a supporting base fixedly connected to the first supporting element , the supporting base comprising at least one supporting feature directly holding one of the first wall and the second wall of the rail element , the supporting base configured to move with the first supporting element to support the rail element ; and a second bracket mounted to the second supporting element , and configured to be mounted to the rack for the server cabinet. a supporting base fixedly connected to the first supporting element , the supporting base comprising at least one supporting feature directly holding one of the first wall and the second wall of the rail element , the supporting base configured to move with the first supporting element to support the rail element ; and a second bracket mounted to the second supporting element , and configured to be mounted to the rack for the server cabinet. <EOS>