A plug connector (100) configured for latching with a receptacle having a latching tab includes a housing (1) defining a top wall (14) and two opposite sidewalls (13), and a releasing mechanism (2) assembled to the housing. The releasing mechanism includes a pair of sliders (21) movably attached to the sidewalls, and an extension spring (25) attached to the top wall. The spring has two free ends (250) respectively connected to the sliders. Each of the sliders includes a narrowed and protruded actuating end (211) adapted for releasing the latching tab of the receptacle from the plug connector when the slider moves from a first position to a second position. The movement of the sliders elongates the spring into an extended state at the second position. The extended spring tends to restore the sliders to the first position.