A plug connector assembly includes: a mating member including an insulative housing and a pair of latching members retained in the insulative housing; a cable; and an outer case, wherein the latching member includes a base portion, a fixing portion forwardly extending from the base portion, a connecting portion upwardly extending from the base portion, an elastic portion forwardly and rearwardly extending from an extremely end of the connecting portion, a locking portion disposed on a front side of the elastic portion and exposed to the insulative housing, and a pressing portion downwardly extending from a rear end of the elastic portion beyond the base portion; the outer case defines an operating portion for operating the latching member; the operating portion drives the pressing portion to disengage the latching with a mating connector; andthe operating direction of the operating portion is opposite to the movement direction of the locking portion.