A slide rail assembly includes a first rail, a second rail, an engagement element and an operating element. The first rail has a blocking feature. The second rail is movable relative to the first rail. The engagement element is arranged on the second rail. When the second rail is moved to a predetermined position relative to the first rail, the engagement element abuts against the blocking feature. The engagement element is configured to be moved away from the blocking feature of the first rail in response to operation of the operating element.