Abstract: A connector includes a lower casing, a circuit board, a connecting head, multiple puncturing terminals, an upper casing and an upper lid. The lower casing includes a base and at least one support pole provided on the base. The base has an accommodating slot. The circuit board disposed in the accommodating slot. The connecting head is disposed on the base, and is electrically connected to the circuit board. The puncturing terminals are disposed on the circuit board. The upper casing includes a casing body, a cantilever structure extending from one side of the casing body and a cable holder located on the cantilever structure. The upper lid is disposed on the upper casing body. The upper lid has a release position and an open position relative to the casing body.