A slide rail mechanism includes a carried object, a first slide rail assembly, a second slide rail assembly and a locking member. The first slide rail assembly includes a first rail configured to be mounted to a rack, and a second rail configured to carry the carried object. The second slide rail assembly includes a third rail arranged on the carried object, and a fourth rail movable relative to the third rail. The locking member is movably mounted on the carried object. During a process of the second rail being moved relative to the first rail along an opening direction to an extended position, the locking member is moved from a first predetermined position to a second predetermined position, such that a locking part of the locking member is configured to prevent the fourth rail from being moved along the opening direction.

A slide rail assembly includes two slide rails. During a process of a first one of the two slide rails being moved relative to a second one of the two slide rails along a predetermined direction, a first predetermined feature and a second predetermined feature are configured to contact each other to provide resistance in order to slow down the relative movement between the two slide rails.