A plug connector (100) mating with a complementary connector has a housing (1) defining a latching recess (117), a cover (3) and a releasing mechanism including a puller (5) and a latch (4) operable by the puller. The latch has a latching portion (42). The latching portion includes a resisting portion (423) for engaging the cover and a claw (424) in front of the resisting portion and projecting toward a first direction. The resisting portion, in response to a rearward movement of the puller, is movable to engage the cover and to pivot the claw from a latched position to a released position where the claw is received in the latching recess along a second direction opposite to the first direction.