The present invention aims to miniaturize a housing. Disclosed is a connector including a female housing (10) having a terminal accommodating chamber (11) formed therein, a first terminal fitting (24) inserted into the terminal accommodating chamber (11), an elastically displaceable lock arm (12) formed in the female housing (10), an accommodating recess (14) formed in the female housing (10) and communicating with a deflection space (13) of the lock arm (12), a terminal holding member (41) mounted in the accommodating recess (14), and a pair of second terminal fittings (58) connected to a twisted pair wire (59) and attached to the terminal holding member (41).