A pipe joint is equipped with a socket and a plug, which are attachable and detachable from each other, wherein a pressure fluid introduced from the plug flows toward the socket through second holes formed in a plug valve. In addition, the pressure fluid flows smoothly along outer circumferential surfaces of the plug valve and a socket valve, and along inner circumferential surfaces of a plug body and a socket body. Further, the pressure fluid flows from the socket body to a back body, through first holes formed in the socket valve.