Abstract: A slide rail assembly includes a first rail with a positioning structure, a second rail displaceable relative to the first rail and providing a concave surface on the back to face the positioning structure, a first stopper pivotally connected to the concave surface corresponding to the first side of the positioning structure, and an operating member movably connected to the second rail and placed on the concave surface so that the operating member is on the side of the first stopper. The slide rail assembly can be installed on the side of the carrier, which can be a server case or drawer, or can be used on servers or furniture.