A slide rail assembly, comprising: a first rail; a second rail movable relative to the first rail; a third rail mounted between the first rail and the second rail; a first sliding auxiliary device movably arranged between the first rail and the third rail, the first sliding auxiliary device comprising at least one first rolling member and a first meshing feature, the least one first rolling member configured to facilitate the third rail to move relative to the first rail; a second sliding auxiliary device movably arranged between the third rail and the second rail, the second sliding auxiliary device comprising at least one second rolling member and a second meshing feature, the least one second rolling member configured to facilitate the second rail to move relative to the third rail; a synchronizing member meshed between the first meshing feature and the second meshing feature; characterized by: a first driving device, a locking device and a swing member, the first driving device comprising a first elastic member, the locking device comprising a locking part and a guiding member, the guiding member configured to generate a force toward the locking part, the swing member movably connected to the second rail; wherein when the swing member is operatively engaged between the locking part and the guiding member, the first elastic member of the first driving device accumulates a first driving force; and when the swing member is operatively disengaged from the locking part and the guiding member, the first driving force is released to drive the second rail to move from a retrieve position to an open position relative to the first rail. a first rail; a second rail movable relative to the first rail; a third rail mounted between the first rail and the second rail; a first sliding auxiliary device movably arranged between the first rail and the third rail, the first sliding auxiliary device comprising at least one first rolling member and a first meshing feature, the least one first rolling member configured to facilitate the third rail to move relative to the first rail; a second sliding auxiliary device movably arranged between the third rail and the second rail, the second sliding auxiliary device comprising at least one second rolling member and a second meshing feature, the least one second rolling member configured to facilitate the second rail to move relative to the third rail; a synchronizing member meshed between the first meshing feature and the second meshing feature; characterized by: a first driving device, a locking device and a swing member, the first driving device comprising a first elastic member, the locking device comprising a locking part and a guiding member, the guiding member configured to generate a force toward the locking part, the swing member movably connected to the second rail; wherein when the swing member is operatively engaged between the locking part and the guiding member, the first elastic member of the first driving device accumulates a first driving force; and when the swing member is operatively disengaged from the locking part and the guiding member, the first driving force is released to drive the second rail to move from a retrieve position to an open position relative to the first rail. a first driving device, a locking device and a swing member, the first driving device comprising a first elastic member, the locking device comprising a locking part and a guiding member, the guiding member configured to generate a force toward the locking part, the swing member movably connected to the second rail; wherein when the swing member is operatively engaged between the locking part and the guiding member, the first elastic member of the first driving device accumulates a first driving force; and when the swing member is operatively disengaged from the locking part and the guiding member, the first driving force is released to drive the second rail to move from a retrieve position to an open position relative to the first rail.