A slide rail assembly includes first and second rails, a running carriage, a correction mechanism, and an actuator. The running carriage is slidably mounted on the first rail, carries the second rail, and, when the second rail is longitudinally displaced relative to the first rail, is differentially moved relative to the second rail. The correction mechanism is mounted on the first rail and includes an action member and a pushing member movably connected to the action member. The actuator is connected to the second rail. Should a differential movement error of the running carriage occur, the actuator drives the action member while the second rail is being extended, thereby displacing the pushing member, and hence the running carriage, so as to correct the error.