A network connector structure includes a connector body and a locking structure. The connector body encloses a conduction wire. The locking structure is attachable to the connector body and includes a withdrawal prevention section and a coupling section. When the network connector structure is inserted into a socket, the withdrawal prevention section of the locking structure is received in the socket in such a way that an engagement face of the engagement section engages and abuts a projection block of the socket to prevent the network connector structure from being withdrawn from the socket. The coupling section detachably mounts the locking structure to the connector body so as to allow for easy replacement.