A delatch mechanism for a plug connector (100) plugged in a cage (20). The delatch mechanism includes a latch block (210) positioned at an exterior surface of the cage, a latch tap (14) positioned at an exterior portion of the plug connector (100), and an actuator member (3) positioned at the exterior portion of the plug connector. The latch tap has a latch hole (1421) for matching with the latch block to lock the plug connector with the cage. Drive the actuator member so that the latch block away from the latch hole to unlock the plug connector from the cage. Through setting the latch block on the cage and the latch hole on the plug connector, the delatch mechanism runs easily for unlatch process.