A slide rail assembly includes a first rail, a second rail and at least one supporting member. The first rail has a first end and a second end opposite to the first end. The second rail is movable relative to the first rail. The second rail has a recessed part. The at least one supporting member is movably mounted between the first rail and the second rail. A portion of the at least one supporting member is accommodated in the recessed part. The at least one supporting member is configured to support the second rail. Wherein, when the at least one supporting member is moved from a first position to a second position, the portion of the at least one supporting member is extended beyond the first end of the first rail.