In one aspect, provided is an electrical connector that can improve reliability of signal connection by ensuring insulation between adjacent terminals. In one aspect, connector housing 2 has front housing 3 and rear housing 4 that are combined together during assembly and that have respective partition walls 10 and 11 to define terminal accommodation chambers 8 and 9, respectively, and wherein movable wall 15 is provided to extend from partition wall 11 of rear housing 4 to displace and connect to partition wall 10 of front housing 3 when both housings 3 and 4 are combined together.