Abstract: The cord stopper comprises: a plug having a plug head, a neck projecting centrally from a rear surface of the plug head and a plate-like cord clamp attached to a distal end of the neck substantially perpendicularly thereto; a socket having centrally in its bottom a recess and a pair of sidewalls located on opposite sides of the recess, the recess having a depth greater than the thickness of the cord clamp for receiving the cord clamp, the sidewalls having two pairs of cord thru-holes, the pair of cord thru-holes of one of the sidewalls being axially aligned with the pair of cord thru-holes of the other sidewall for threading therethrough a cord; and moving means located between the plug and the socket for moving the cord clamp forwardly and backwardly in the recess.