Abstract: Provided is a socket for a connecting jack, which is capable of preventing a popping noise from being generated. The connecting jack includes a connecting part including a tip having an end of a cone shape to perform a function of transmitting a signal through a cable and a sleeve having a cylindrical shape to perform a ground function. The connecting jack is inserted into the socket of a guitar or an amplifier. The socket includes: a cover member buried in a fixing part of the guitar or the amplifier; a signal terminal fixed to the cover member and protruding toward the fixing part; a ground member hinge-coupled in the cover member; and an elastic piece.