A connector structure, accommodating a flat cable via a front end thereof is disclosed. The flat cable defines a recess at each lateral side thereof; and the connector structure includes a connection base, a lid member, a plurality of terminals, and a pair of latch members being made of metallic materials. The connection base has a base portion, a pair of sidewalls extending backwards from two lateral sides of the base portion respectively. The lid member includes a pair of pivotal shafts pivoted respectively to the sidewalls of the connection base, and a pair of brake shafts each being adjacent to an inner side of each pivotal shaft. Each of the latch members is secured to each sidewall of the connection base, and has a latch arm. After the lid member covers over, the brake shafts actuate the latch arms in order to engage the recesses of the flat cable.