Abstract: A rotatable signal socket includes a fixing part, a connecting part, and a flexible printed circuit board (FPCB). The rotatable signal socket is assembled on a printed circuit board (PCB) of an electronic device for connecting a signal cable to the PCB. The fixing part is fixed on the PCB. One end of the connecting part is pivoted to the fixing part in order to rotate relative to the fixing part and the PCB. The signal cable is inserted into the other end of the connecting part. The FPCB extends from the fixing part to the connecting part, so as to electrically connect the PCB and the signal cable, thus providing a signal socket that is easy to be assembled and occupies little space.