A latch mechanism is provided, including a rack having a restricting structure and a linkage assembly connected to an electronic device in the rack. The linkage assembly includes a fixed frame, connected to the electronic device; a sliding frame, movable along a first direction relative to the fixed frame; a handle, connected to the sliding frame; a trigger, movably disposed between the handle and the sliding frame; and a latch member, connected to the fixed frame and the restricting structure to restrict the electronic device in the rack. When an external force is exerted on the trigger and the handle to move the sliding frame along the first direction relative the fixed frame, the trigger pushes the latch member to separate from the restricting structure along a second direction perpendicular to the first direction, such that the electronic device can be drawn out of the rack.